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(Resolvido) Redimensionar igual do Orkut

Dexter Morgan

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Dexter Morgan

Dexter Morgan

Posted
Posted

Olá consegui desenvolver um código pegando um pouco aqui e ali que faz redimenciona a imagem igual no orkut exe:

se Horizontal for maior que 800 ele faz o resize para 800 proporcionamente com o tamanho verticcal então fica +- assim

1280 x 800 = 800 x 533 +- isso ..

e o legal que faz extamento o mesmo se de em vez de horizontal a vertical for maior assim:

800 X 1280 = 533 x 800

mas tem alguns erros que não consegui corrigir segue o código

resize.php

<?php

function redimensionar($imagem, $name, $medida, $pasta){
$img = imagecreatefromjpeg($imagem['tmp_name']);
$x = imagesx($img);
$y = imagesy($img);
if($x>$y){
$medida[0]=800;
$medida[1]=($medida[0] * $y)/$x;
}
else{
$medida[1]=800;
$medida[0]=($medida[1] * $x)/$y;
}
$nova = imagecreatetruecolor($medida[0],$medida[1]);
imagecopyresampled($nova, $img, 0, 0, 0, 0, $medida[0], $medida[1],imagesx($img), imagesy($img));
imagejpeg($nova, "$pasta/$name");
imagedestroy($img);
imagedestroy($nova);
return $name;
}

?>
quero implementar ele nesse código de mullti envio 
<?php

if(isset($_POST['submit'])){
$id_noticias = $_GET["id_noticias"];
$fotos = $_FILES["img"];
$pasta = 'fotos/';
foreach($_FILES["img"]["error"] as $key => $error){
if($error == UPLOAD_ERR_OK){
$tmp_name = $_FILES["img"]["tmp_name"][$key];
$ext = array("jpeg","jpg","png","gif");
$fotos = md5(uniqid(time())) . "." . $ext[1];
$uploadfile = $pasta . basename($fotos);
if(move_uploaded_file($tmp_name, $uploadfile)){
echo "<script>alert('Publicado com Sucesso!');document.location.href='java script:history.back()';</script>";
$insert = mysql_query("INSERT INTO fotos (id_noticias, fotos) VALUES ('$id_noticias', '$fotos')");
}
else{
echo "<script>alert('Erro ao Publicar!');document.location.href='java script:history.back()';</script>";
}
}
}
}

?>

o erro no resize é que se foto for menor que 800 ele faz ela ficar com 800 se 10 po 10 ele faz ficar com 800 por 800 tenso isso rsr quem puder ajudar vlw.

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Tiago Biage

Tiago Biage

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Posted

Oi Dexter,

eu criei um arquivo que uso pra dimensionar na hora de mostrar. Vê se te ajuda.

pra chamar uso assim:

<img src="thumb_maker.php?img=ENDERECOIMAGEM&x=100&y=100" border="0">
img é o endereço, x é a largura e y a altura da imagem. Se passar só o valor de x 
<img src="thumb_maker.php?img=ENDERECOIMAGEM&x=100" border="0">
vai redimencionar proporcionalmente, mesma coisa se passar só o valor de y. o arquivo é esse: thumb_maker.php 
<?
        ini_set("memory_limit","1000M");
    ini_set('allow_url_fopen', 'on');
    $MaxLarg = $largura = $_GET["x"] != ''?$_GET["x"]:'';
    $MaxAlt = $altura = $_GET["y"] != ''?$_GET["y"]:'';
    
    $tb_x = $_GET["tb_x"] != ''?$_GET["tb_x"]:'';
    $tb_y = $_GET["tb_y"] != ''?$_GET["tb_y"]:'';
    
    $foto = $_GET["img"];
    
    $Ext = substr($foto,-4);
    if(strtoupper($Ext) == ".JPG") 
    {        
        $ExtFunc = "jpeg";    
    }elseif(strtoupper($Ext) == ".GIF")
    {
        $ExtFunc = "gif";
    }elseif(strtoupper($Ext) == ".PNG")
    {
        $ExtFunc = "png";
    }
    
    $CriarImagemDe = "imagecreatefrom" . $ExtFunc;
    
    $img = $img_origem = $CriarImagemDe($foto);
    
    $numWdt = $origX = imagesx($img_origem);
    $numHgt = $origY = imagesy($img_origem);
    
    if($largura != '' && $altura != '')
    {                                
        if(($tb_x == '' && $tb_y == '') || ($tb_x == 0 && $tb_y == 0))
        {
            if( ($MaxLarg > $numWdt) && ($MaxAlt > $numHgt) ) 
            {
                $nova = $img_origem;
                $width = $numWdt;
                $height = $numHgt;
            }else
            {
                $areanova = $MaxLarg*$MaxAlt; 
                $largarea = $MaxAlt * $numWdt;
                $altarea = $MaxLarg * $numHgt; 
                $maxlargarea = $areanova / $largarea;
                $maxaltarea = $areanova / $altarea; 
                if($maxlargarea > $maxaltarea) 
                {
                    $width = $maxlargarea*$numWdt;
                    $height = $maxlargarea*$numHgt;
                }else
                {
                    $width = $maxaltarea*$numWdt;
                    $height = $maxaltarea*$numHgt;
                };
                $nova = imagecreatetruecolor($width,$height);
                
                imagesavealpha($nova, true);
                $trans_colour = imagecolorallocatealpha($nova, 0, 0, 0, 127);
                imagefill($nova, 0, 0, $trans_colour);

                imagecopyresampled($nova, $img_origem, 0,0,0,0,$width,$height,$numWdt-1,$numHgt);
            };
     
            if($width > $MaxLarg) 
            {
                $nx = ($width-$MaxLarg)/2;
            }else 
            {
                $nx = 0;
            }
            if($height < $MaxAlt) 
            {
                $ny = ($height-$MaxAlt)/2;
            }else 
            {
                $ny = 0;
            }
             
            $i = imagecreatetruecolor($MaxLarg,$MaxAlt);
            
            imagesavealpha($i, true);
            $trans_colour = imagecolorallocatealpha($i, 0, 0, 0, 127);
            imagefill($i, 0, 0, $trans_colour);
                
            imagecopy($i, $nova, 0, 0, $nx, $ny,$MaxLarg,$MaxAlt);
        }else
        {            
            $destX = $largura;
            $destY = $altura;
            if($origY>$origX)
            {
                $porc = ($largura*100)/$origX;
                $destY = $tamY = ($origY*$porc)/100;
                if($destY<=$MaxAlt) $destY=$MaxAlt;
            }else
            {
                
                $porc = ($altura*100)/$origY;
                $destX = $tamX = ($origX*$porc)/100;
                if($destX<=$MaxLarg) $destX=$MaxLarg;                
            }
            $img_destino = imagecreatetruecolor($destX,$destY);
            
            imagesavealpha($img_destino, true);
            $trans_colour = imagecolorallocatealpha($img_destino, 0, 0, 0, 127);
            imagefill($img_destino, 0, 0, $trans_colour);
            
            imagecopyresampled( $img_destino, $img_origem, 0, 0, 0, 0, $destX, $destY, $origX, $origY );
            
            $porcy = ($tb_y*100)/$origY;
            $ny = ($MaxAlt*$porcy)/100;
            
            $porcx = ($tb_x*100)/$origX;
            $nx = ($MaxLarg*$porcx)/100;
            
            if(($destY-$ny)<$MaxAlt) $ny = $destY-$MaxAlt;
            if(($destX-$nx)<$MaxLarg) $nx = $destX-$MaxLarg;
            
            $i = imagecreatetruecolor($MaxLarg,$MaxAlt);
            
            imagesavealpha($i, true);
            $trans_colour = imagecolorallocatealpha($i, 0, 0, 0, 127);
            imagefill($i, 0, 0, $trans_colour);
            
            imagecopy($i, $img_destino, 0, 0, $nx, $ny,$destX,$destY);            
        }
        $img = $i;
    }else
    {
        $destX = $largura;
        $destY = $altura;
        if($largura != '')
        {
            $porc = ($largura*100)/$origX;
            $destY = $tamY = ($origY*$porc)/100;
        }
        if($altura != '')
        {    
            $porc = ($altura*100)/$origY;
            $destX = $tamX = ($origX*$porc)/100;
        }    
        $img_destino = imagecreatetruecolor($destX,$destY);
        
        imagesavealpha($img_destino, true);
        $trans_colour = imagecolorallocatealpha($img_destino, 0, 0, 0, 127);
        imagefill($img_destino, 0, 0, $trans_colour);
        
        imagecopyresampled( $img_destino, $img_origem, 0, 0, 0, 0, $destX, $destY, $origX, $origY );
        imagedestroy($img_origem); 
        $img = $img_destino;
    }

    header('Content-type: image/'.$ExtFunc); 
    $aux = 'image'.$ExtFunc;        
    
    if($ExtFunc == 'png') $aux($img);    
        else $aux($img,NULL,100);    
    imagedestroy($img);
?>
Olá consegui desenvolver um código pegando um pouco aqui e ali que faz redimenciona a imagem igual no orkut exe: se Horizontal for maior que 800 ele faz o resize para 800 proporcionamente com o tamanho verticcal então fica +- assim 1280 x 800 = 800 x 533 +- isso .. e o legal que faz extamento o mesmo se de em vez de horizontal a vertical for maior assim: 800 X 1280 = 533 x 800 mas tem alguns erros que não consegui corrigir segue o código resize.php 
<?php

function redimensionar($imagem, $name, $medida, $pasta){
$img = imagecreatefromjpeg($imagem['tmp_name']);
$x = imagesx($img);
$y = imagesy($img);
if($x>$y){
$medida[0]=800;
$medida[1]=($medida[0] * $y)/$x;
}
else{
$medida[1]=800;
$medida[0]=($medida[1] * $x)/$y;
}
$nova = imagecreatetruecolor($medida[0],$medida[1]);
imagecopyresampled($nova, $img, 0, 0, 0, 0, $medida[0], $medida[1],imagesx($img), imagesy($img));
imagejpeg($nova, "$pasta/$name");
imagedestroy($img);
imagedestroy($nova);
return $name;
}

?>
quero implementar ele nesse código de mullti envio 
<?php

if(isset($_POST['submit'])){
$id_noticias = $_GET["id_noticias"];
$fotos = $_FILES["img"];
$pasta = 'fotos/';
foreach($_FILES["img"]["error"] as $key => $error){
if($error == UPLOAD_ERR_OK){
$tmp_name = $_FILES["img"]["tmp_name"][$key];
$ext = array("jpeg","jpg","png","gif");
$fotos = md5(uniqid(time())) . "." . $ext[1];
$uploadfile = $pasta . basename($fotos);
if(move_uploaded_file($tmp_name, $uploadfile)){
echo "&lt;script>alert('Publicado com Sucesso!');document.location.href='java script:history.back()';</script>";
$insert = mysql_query("INSERT INTO fotos (id_noticias, fotos) VALUES ('$id_noticias', '$fotos')");
}
else{
echo "&lt;script>alert('Erro ao Publicar!');document.location.href='java script:history.back()';</script>";
}
}
}
}

?>

o erro no resize é que se foto for menor que 800 ele faz ela ficar com 800 se 10 po 10 ele faz ficar com 800 por 800 tenso isso rsr quem puder ajudar vlw.

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Dexter Morgan

Dexter Morgan

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Posted (edited)

Tiago Biage , esse código aí funciona beleza e é bastante util ,,mas para esse meu código não serve pois também quero evitar fotos grandes no servidor , mas esse teu código vai me ser util em outro projeto,,

uma pergunta tipo ali testei e vi que ele faz a proporção corretamente ,,mas teria como tipo fazer outro valor para ele diferenciar em qual parte tem a medida maior??

ex foto tem a largura maior que a altura então ficaria 800 com a altura proporcional certo

<img src="thumb_maker.php?img=ENDERECOIMAGEM&outrovalor=800" border="0">
ex foto tem a altura maior que a largura então ficaria 800 com a largura proporcional certo 
<img src="thumb_maker.php?img=ENDERECOIMAGEM&outrovalor=800" border="0">

agora se os valores da imagem forem menor que 800 mostra o tamanho real.

vlw cara mesmo assim,,,,

Edited by Dexter Morgan
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Dexter Morgan

Dexter Morgan

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Posted (edited) 

[28-Sep-2011 00:42:00] PHP Warning: imagecreatefromjpeg() [<a href='function.imagecreatefromjpeg'>function.imagecreatefromjpeg</a>]: gd-jpeg: JPEG library reports unrecoverable error: in /home/jornalv/public_html/administracao/fotos/resize.php on line 21
[28-Sep-2011 00:42:00] PHP Warning: imagecreatefromjpeg() [<a href='function.imagecreatefromjpeg'>function.imagecreatefromjpeg</a>]: '34df8473ab6f61af670b1b3ae4a50d93.jpg' is not a valid JPEG file in /home/jornalv/public_html/administracao/fotos/resize.php on line 21
[28-Sep-2011 00:42:00] PHP Warning: imagesx(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 22
[28-Sep-2011 00:42:00] PHP Warning: imagesy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 23
[28-Sep-2011 00:42:00] PHP Warning: Division by zero in /home/jornalv/public_html/administracao/fotos/resize.php on line 105
[28-Sep-2011 00:42:00] PHP Warning: imagecreatetruecolor() [<a href='function.imagecreatetruecolor'>function.imagecreatetruecolor</a>]: Invalid image dimensions in /home/jornalv/public_html/administracao/fotos/resize.php on line 112
[28-Sep-2011 00:42:00] PHP Warning: imagesavealpha(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 113
[28-Sep-2011 00:42:00] PHP Warning: imagecolorallocatealpha(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 114
[28-Sep-2011 00:42:00] PHP Warning: imagefill(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 115
[28-Sep-2011 00:42:00] PHP Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 116
[28-Sep-2011 00:42:00] PHP Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 117
[28-Sep-2011 00:42:00] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/jornalv/public_html/administracao/fotos/resize.php:21) in /home/jornalv/public_html/administracao/fotos/resize.php on line 120
[28-Sep-2011 00:42:00] PHP Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 123
[28-Sep-2011 00:42:00] PHP Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 124
[28-Sep-2011 00:43:00] PHP Warning: imagecreatefromjpeg() [<a href='function.imagecreatefromjpeg'>function.imagecreatefromjpeg</a>]: gd-jpeg: JPEG library reports unrecoverable error: in /home/jornalv/public_html/administracao/fotos/resize.php on line 21
[28-Sep-2011 00:43:00] PHP Warning: imagecreatefromjpeg() [<a href='function.imagecreatefromjpeg'>function.imagecreatefromjpeg</a>]: '34df8473ab6f61af670b1b3ae4a50d93.jpg' is not a valid JPEG file in /home/jornalv/public_html/administracao/fotos/resize.php on line 21
[28-Sep-2011 00:43:00] PHP Warning: imagesx(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 22
[28-Sep-2011 00:43:00] PHP Warning: imagesy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 23
[28-Sep-2011 00:43:00] PHP Warning: Division by zero in /home/jornalv/public_html/administracao/fotos/resize.php on line 105
[28-Sep-2011 00:43:00] PHP Warning: imagecreatetruecolor() [<a href='function.imagecreatetruecolor'>function.imagecreatetruecolor</a>]: Invalid image dimensions in /home/jornalv/public_html/administracao/fotos/resize.php on line 112
[28-Sep-2011 00:43:00] PHP Warning: imagesavealpha(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 113
[28-Sep-2011 00:43:00] PHP Warning: imagecolorallocatealpha(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 114
[28-Sep-2011 00:43:00] PHP Warning: imagefill(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 115
[28-Sep-2011 00:43:00] PHP Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 116
[28-Sep-2011 00:43:00] PHP Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 117
[28-Sep-2011 00:43:00] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/jornalv/public_html/administracao/fotos/resize.php:21) in /home/jornalv/public_html/administracao/fotos/resize.php on line 120
[28-Sep-2011 00:43:00] PHP Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 123
[28-Sep-2011 00:43:00] PHP Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 124
[28-Sep-2011 00:52:14] PHP Warning: imagecreatefromjpeg() [<a href='function.imagecreatefromjpeg'>function.imagecreatefromjpeg</a>]: gd-jpeg: JPEG library reports unrecoverable error: in /home/jornalv/public_html/administracao/fotos/resize.php on line 21
[28-Sep-2011 00:52:14] PHP Warning: imagecreatefromjpeg() [<a href='function.imagecreatefromjpeg'>function.imagecreatefromjpeg</a>]: 'c5c78c75d60724a4f9879171493e0893.jpg' is not a valid JPEG file in /home/jornalv/public_html/administracao/fotos/resize.php on line 21
[28-Sep-2011 00:52:14] PHP Warning: imagesx(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 22
[28-Sep-2011 00:52:14] PHP Warning: imagesy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 23
[28-Sep-2011 00:52:14] PHP Warning: Division by zero in /home/jornalv/public_html/administracao/fotos/resize.php on line 105
[28-Sep-2011 00:52:14] PHP Warning: imagecreatetruecolor() [<a href='function.imagecreatetruecolor'>function.imagecreatetruecolor</a>]: Invalid image dimensions in /home/jornalv/public_html/administracao/fotos/resize.php on line 112
[28-Sep-2011 00:52:14] PHP Warning: imagesavealpha(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 113
[28-Sep-2011 00:52:14] PHP Warning: imagecolorallocatealpha(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 114
[28-Sep-2011 00:52:14] PHP Warning: imagefill(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 115
[28-Sep-2011 00:52:14] PHP Warning: imagecopyresampled(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 116
[28-Sep-2011 00:52:14] PHP Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 117
[28-Sep-2011 00:52:14] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/jornalv/public_html/administracao/fotos/resize.php:21) in /home/jornalv/public_html/administracao/fotos/resize.php on line 120
[28-Sep-2011 00:52:14] PHP Warning: imagejpeg(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 123
[28-Sep-2011 00:52:14] PHP Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/jornalv/public_html/administracao/fotos/resize.php on line 124

cara as vezez ocorre esse erro nas fotos, parece que é invalidas tem como corrigir?

Edited by Dexter Morgan
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Dexter Morgan

Dexter Morgan

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Posted

deu certo agora se a foto for menor deixa como esta ficou assim

<?php

function redimensionar($imagem, $name, $medida, $pasta){
$img = imagecreatefromjpeg($imagem['tmp_name']);
$x = imagesx($img);
$y = imagesy($img);
$medida[0]=800;
$medida[1]=800;
if($x>$medida[0] || $y>$medida[1]){
if($x>$y){
$medida[1]=($medida[0] * $y)/$x;
}
elseif($y>$x){
$medida[0]=($medida[1] * $x)/$y;
}
else{
$medida[0]=$x/($x/$medida[0]);
$medida[1]=$y/($y/$medida[1]);
}
}
else{
$medida[0]=$x;
$medida[1]=$y;
}
$nova = imagecreatetruecolor($medida[0],$medida[1]);
imagecopyresampled($nova, $img, 0, 0, 0, 0, $medida[0], $medida[1], imagesx($img), imagesy($img));
imagejpeg($nova, "$pasta/$name");
imagedestroy($img);
imagedestroy($nova);
return $name;
}

?>
<?php

if(isset($_POST['acao']) && $_POST['acao'] == 'cadastrar'){
$foto = $_FILES['foto'];
if($foto['type'] == 'image/jpeg'){
require("resize.php");
$name = 'foto='.md5(uniqid(rand(), true)).".jpg";
redimensionar($foto, $name, $medida, "fotos");
}
}

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Redimensionar Imagem</title>
</head>

        <body>

<form method="post" action="" enctype="multipart/form-data">
<font face="verdana" color="#888888" size="2">Fotos</font><br />
<input type="file" name="foto" /><br /><br />
<input type="submit" value="enviar fotos" />
<input type="hidden" name="acao" value="cadastrar" />
</form>

        </body>

</html>
mas agora precisava implementar ele nesse código como disse acima 
<?php

if(isset($_POST['submit'])){
$id_noticias = $_GET["id_noticias"];
$fotos = $_FILES["img"];
$pasta = 'fotos/';
foreach($_FILES["img"]["error"] as $key => $error){
if($error == UPLOAD_ERR_OK){
$tmp_name = $_FILES["img"]["tmp_name"][$key];
$ext = array("jpeg","jpg","png","gif");
$fotos = md5(uniqid(time())) . "." . $ext[1];
$uploadfile = $pasta . basename($fotos);
if(move_uploaded_file($tmp_name, $uploadfile)){
echo "<script>alert('Publicado com Sucesso!');document.location.href='java script:history.back()';</script>";
$insert = mysql_query("INSERT INTO fotos (id_noticias, fotos) VALUES ('$id_noticias', '$fotos')");
}
else{
echo "<script>alert('Erro ao Publicar!');document.location.href='java script:history.back()';</script>";
}
}
}
}

?>

já tentei e não consegui ...

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Dexter Morgan

Dexter Morgan

Posted
  • Author
Posted 

<?php

class redimensionar{
var $image;
var $image_type;
function load($filename){
$image_info = getimagesize($filename);
$this->image_type = $image_info[2];
if($this->image_type == IMAGETYPE_JPEG){
$this->image = imagecreatefromjpeg($filename);
}
elseif($this->image_type == IMAGETYPE_GIF){
$this->image = imagecreatefromgif($filename);
}
elseif($this->image_type == IMAGETYPE_PNG){
$this->image = imagecreatefrompng($filename);
}
}
function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null){
if($image_type == IMAGETYPE_JPEG){
imagejpeg($this->image,$filename,$compression);
}
elseif($image_type == IMAGETYPE_GIF){
imagegif($this->image,$filename);
}
elseif($image_type == IMAGETYPE_PNG){
imagepng($this->image,$filename);
}
if($permissions != null){
chmod($filename,$permissions);
}
}
function output($image_type=IMAGETYPE_JPEG){
if($image_type == IMAGETYPE_JPEG){
imagejpeg($this->image);
}
elseif($image_type == IMAGETYPE_GIF){
imagegif($this->image);
}
elseif($image_type == IMAGETYPE_PNG){
imagepng($this->image);
}
}
function getWidth(){
return imagesx($this->image);
}
function getHeight(){
return imagesy($this->image);
}
function resizeToScale($width){
$width=800;
$height=800;
if($this->getWidth()>$width || $this->getHeight()>$height){
if($this->getWidth()>$this->getHeight()){
$height=($width * $this->getHeight())/$this->getWidth();
$this->resize($width,$height);
}
elseif($this->getHeight()>$this->getWidth()){
$width=($height * $this->getWidth())/$this->getHeight();
$this->resize($width,$height);
}
else{
$width=$this->getWidth()/($this->getWidth()/$width);
$height=$this->getHeight()/($this->getHeight()/$height);
$this->resize($width,$height);
}
}
else{
$width=$this->getWidth();
$height=$this->getHeight();
$this->resize($width,$height);
}
}
function resize($width,$height){
$new_image = imagecreatetruecolor($width,$height);
imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
$this->image = $new_image;
}
}

?>
if(move_uploaded_file($tmp_name, $uploadfile)){
include_once('redimensiona.php');
$image = new redimensionar();
$image->load($uploadfile);
$image->resizeToScale(800);
$image->save($uploadfile);

ta aí

funciona beleza ...

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