How to dynamically generate thumbnails in php and output them for display, php dynamically generate thumbnails_PHP tutorial

How to dynamically generate thumbnails in php and output them for display. How to dynamically generate thumbnails in php

This article describes the method of dynamically generating thumbnails in php and outputting them for display. Share it with everyone for your reference. The details are as follows:

Calling method:

<img src="thumbs.php&#63;filename=photo.jpg&width=100&height=100">

This code can dynamically generate thumbnails for large pictures to display. The pictures are generated in memory and do not generate real files on the hard disk

thumbs.php file is as follows:

<&#63;php
$filename= $_GET['filename'];
$width = $_GET['width'];
$height = $_GET['height'];
$path="http://localhost/images/"; //finish in "/"
// Content type
header('Content-type: image/jpeg');
// Get new dimensions
list($width_orig, $height_orig) = getimagesize($path.$filename);
if ($width && ($width_orig < $height_orig)) {
  $width = ($height / $height_orig) * $width_orig;
} else {
  $height = ($width / $width_orig) * $height_orig;
}
// Resample
$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($path.$filename);
imagecopyresampled($image_p,$image,0,0,0,0,$width,$height,$width_orig,$height_orig);
// Output
imagejpeg($image_p, null, 100);
// Imagedestroy
imagedestroy ($image_p);
&#63;>

I hope this article will be helpful to everyone’s PHP programming design.

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