PHP image Processing Function Example Summary, PHP picture function Instance Code

Imagecolorsforindex () Imagecolorat () Draw a graphic on the picture $img =imagecreatefromgif ("./images/map.gif"); /** * Image Sharpening Processing * Edit by Bbs.it-home.org */ $red = Imagecolorallocate ($img, 255, 0, 0); Imageline ($img, 0, 0, +, +, $red); Imageellipse ($img, $, $red); Imagegif ($img, "./images/map2.gif"); Imagedestroy ($IMG); Copy Code Picture Normal Zoom function Thumn ($background, $width, $height, $newfile) { List ($s _w, $s _h) =getimagesize ($background);//Get original picture height, width if ($width && ($s _w < $s _h)) { $width = ($height/$s _h) * $s _w; } else { $height = ($width/$s _w) * $s _h; } $new =imagecreatetruecolor ($width, $height); $img =imagecreatefromjpeg ($background); Imagecopyresampled ($new, $img, 0, 0, 0, 0, $width, $height, $s _w, $s _h); Imagejpeg ($new, $newfile); Imagedestroy ($new); Imagedestroy ($IMG); } Thumn ("Images/hee.jpg", "A./images/hee3.jpg"); Copy Code GIF Transparent Color processing /** * Picture Clipping processing * Edit by Bbs.it-home.org */ function Cut ($background, $cut _x, $cut _y, $cut _width, $cut _height, $location) { $back =imagecreatefromjpeg ($background); $new =imagecreatetruecolor ($cut _width, $cut _height); Imagecopyresampled ($new, $back, 0, 0, $cut _x, $cut _y, $cut _width, $cut _height, $cut _width, $cut _height); Imagejpeg ($new, $location); Imagedestroy ($new); Imagedestroy ($back); } Cut ("./images/hee.jpg", the 117, the "./images/hee5.jpg"); ?> Copy Code image watermark and watermark text /** * * Image Add text watermark */ function Mark_text ($background, $text, $x, $y) { $back =imagecreatefromjpeg ($background); $color =imagecolorallocate ($back, 0, 255, 0); Imagettftext ($back, 0, $x, $y, $color, "Simkai.ttf", $text); Imagejpeg ($back, "./images/hee7.jpg"); Imagedestroy ($back); } Mark_text ("./images/hee.jpg", "elaborating PHP", 150, 250); Image watermark function Mark_pic ($background, $waterpic, $x, $y) { $back =imagecreatefromjpeg ($background); $water =imagecreatefromgif ($waterpic); $w _w=imagesx ($water); $w _h=imagesy ($water); Imagecopy ($back, $water, $x, $y, 0, 0, $w _w, $w _h); Imagejpeg ($back, "./images/hee8.jpg"); Imagedestroy ($back); Imagedestroy ($water); } Mark_pic ("./images/hee.jpg", "./images/gaolf.gif", 50, 200); Copy Code Picture Rotation /** * Picture rotation * Edit by Bbs.it-home.org */ $back =imagecreatefromjpeg ("./images/hee.jpg"); $new =imagerotate ($back, 45, 0); Imagejpeg ($new, "./images/hee9.jpg"); ?> Copy Code Picture Horizontal Flip Vertical Flip /** * Picture Horizontal Flip Vertical Flip * Edit by Bbs.it-home.org */ function turn_y ($background, $newfile) { $back =imagecreatefromjpeg ($background); $width =imagesx ($back); $height =imagesy ($back); $new =imagecreatetruecolor ($width, $height); for ($x =0; $x < $width; $x + +) { Imagecopy ($new, $back, $width-$x-1, 0, $x, 0, 1, $height); } Imagejpeg ($new, $newfile); Imagedestroy ($back); Imagedestroy ($new); } function turn_x ($background, $newfile) { $back =imagecreatefromjpeg ($background); $width =imagesx ($back); $height =imagesy ($back); $new =imagecreatetruecolor ($width, $height); for ($y =0; $y < $height; $y + +) { Imagecopy ($new, $back, 0, $height-$y-1, 0, $y, $width, 1); } Imagejpeg ($new, $newfile); Imagedestroy ($back); Imagedestroy ($new); } Turn_y ("./images/hee.jpg", "./images/hee11.jpg"); Turn_x ("./images/hee.jpg", "./images/hee12.jpg"); ?> Copy Code

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