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Make Thumb Image PHP

PHP

This script creates a 100px wide and high square from any jpg, gif or png image. Copy the script and save it as thumb.php.

<?php
if( isset($_GET[img]) ){

// image source and extension
$imgSrc = $_GET[img];
$imgExt = substr($imgSrc,-3);

// thumb image size in pixels
$thumbnail_width = 100;
$thumbnail_height = 100;

// getting the image dimensions  
list($width_orig, $height_orig) = getimagesize($imgSrc);   
// image type
if($imgExt == "jpg"){ $myImage = imagecreatefromjpeg($imgSrc); }
if($imgExt == "gif"){ $myImage = imagecreatefromgif($imgSrc); }
if($imgExt == "png"){ $myImage = imagecreatefrompng($imgSrc); }

$ratio_orig = $width_orig/$height_orig;

if ($thumbnail_width/$thumbnail_height > $ratio_orig) {
   $new_height = $thumbnail_width/$ratio_orig;
   $new_width = $thumbnail_width;
} else {
   $new_width = $thumbnail_height*$ratio_orig;
   $new_height = $thumbnail_height;
}

$x_mid = $new_width/2;  //horizontal middle
$y_mid = $new_height/2; //vertical middle

$process = imagecreatetruecolor(round($new_width), round($new_height)); 

imagecopyresampled($process, $myImage, 0, 0, 0, 0, $new_width, $new_height, $width_orig, $height_orig);
$thumb = imagecreatetruecolor($thumbnail_width, $thumbnail_height); 
imagecopyresampled($thumb, $process, 0, 0, ($x_mid-($thumbnail_width/2)), ($y_mid-($thumbnail_height/2)), $thumbnail_width, $thumbnail_height, $thumbnail_width, $thumbnail_height);

imagedestroy($process);
imagedestroy($myImage);	

if($imgExt == "jpg"){ imagejpeg($thumb, null, 100); }
if($imgExt == "gif"){ imagegif($thumb); }
if($imgExt == "png"){ imagepng($thumb, null, 9); }

}
?>

HTML

This is how you use the PHP script in your website. Replace picture.jpg with your image source.

<img src="thumb.php?img=picture.jpg" alt="" />


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3 comments

BolduanYG2013-04-15 11:25

just dropping by to say hello

Gergely2012-12-28 17:41

Unfortunately, you can not do it with this script. I wrote a new tbumbnail generator script with more options. Check it out: Generate Thumbnail on the Fly with PHP

Wbmstr2012-12-21 10:18

Great script! How can I keep the original aspect ratio?

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