script php per ridimensionare immagini in proporzione, e upload

script php per ridimensionare immagini in proporzione, e upload



// This is the temporary file created by PHP

$uploadedfile = $_FILES['uploadfile']['tmp_name'];


// Create an Image from it so we can do the resize

$src = imagecreatefromjpeg($uploadedfile);


// Capture the original size of the uploaded image

list($width,$height)=getimagesize($uploadedfile);


// For our purposes, I have resized the image to be

// 600 pixels wide, and maintain the original aspect

// ratio. This prevents the image from being "stretched"

// or "squashed". If you prefer some max width other than

// 600, simply change the $newwidth variable

$newwidth=600;

$newheight=($height/$width)*$newwidth;

$tmp=imagecreatetruecolor($newwidth,$newheight);


// this line actually does the image resizing, copying from the original

// image into the $tmp image

imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);


// now write the resized image to disk. I have assumed that you want the

// resized, uploaded image file to reside in the ./images subdirectory.

$filename = "images/". $_FILES['uploadfile']['name'];

imagejpeg($tmp,$filename,100);


imagedestroy($src);

imagedestroy($tmp); // NOTE: PHP will clean up the temp file it created when the request

// has completed.

?>


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2 commenti:

  1. Lo scirpt non funziona se faccio un upload di un immagine trasparente in PNG o GIF

    RispondiElimina
  2. lo script non funziona

    RispondiElimina

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