Php method for creating transparent PNG images

This article mainly share with you the method of creating transparent PNG in PHP, hope to help everyone.

Certified as available, the code is as follows:

<?php/*  * $sourePic: Original path  * $smallFileName: Small map name  * $width: Small image width  * $heigh: Small figure high  */function Pngthumb ($sourePic, $smallFileName, $width, $heigh) {    $image = imagecreatefrompng ($sourePic);//png    Imagesavealpha ($image, true);//It's important here to not lose the transparent color of $sourepic image ;    $BigWidth =imagesx ($image);//Large image width    $BigHeigh =imagesy ($image);//Large Image height    $thumb = Imagecreatetruecolor ($width, $ Heigh);    Imagealphablending ($thumb, false);//This is important, meaning that the color is not merged, directly replaced with the $img image color, including the transparent color;    Imagesavealpha ($thumb, true);//Here is very important, meaning not to lose the transparent color of $thumb image;    if (imagecopyresampled ($thumb, $image, 0,0,0,0, $width, $heigh, $BigWidth, $BigHeigh)) {        imagepng ($thumb, $ smallfilename);    }    return $smallFileName;//Returns the small graph path}pngthumb ("001.png", "Test2.png", 300, 300);//Call echo ' <p style= ' Background-color: Red; " ></p> ";? >