PHP Basic five image processing

This article introduces the content of the PHP basic image processing, has a certain reference value, now share to everyone, the need for friends can refer to

<!--image processing--><?php//picture processing GD2 profile modification?><!--picture processing function to draw a picture--><?php//$img = Imagecreatetruecolor (5 //$red = Imagecolorallocate ($img, 255, 0, 0);//$green = imagecolorallocate ($img, 0, 255, 0);//$blu E = imagecolorallocate ($img, 0, 0, 255);//$pur = Imagecolorallocate ($img, 255, 0, 255);//$yellow = Imagecolorall    Ocate ($img, 121, 72, 0); Imagefilledrectangle ($img, 0, 0, $green);//Imageline ($img, 0, 0,, $red);//Imageline ($i    MG, 0, 0, $blue);    Imagefilledellipse ($img, $yellow);    Imagefilledellipse ($img, $, $blue); Imagejpeg ($img, ' haha.jpg ');//echo "<!--Development Verification Code (generate verification code)--><?php Check_code (); function Check_code ($width = $height, $num = 4, $type = ' jpeg ') {$img = Imagecreate ($width, $heigh        T);        $string = "; for ($i= 0; $i < $num;            $i + +) {$rand = Mt_rand (0, 2);                    Switch ($rand) {case 0: $ascii = Mt_rand (48, 57);                Break                    Case 1: $ascii = Mt_rand (65, 90);                Break                    Case 2: $ascii = Mt_rand (97, 122);            Break        } $string. = sprintf ('%c ', $ascii);        } imagefilledrectangle ($img, 0, 0, $width, $height, randbg ($img)); for ($i = 0; $i < $i + +) {Imagesetpixel ($img, Mt_rand (0, $width), Mt_rand (0, $height), ran        Dpix ($img));            } for ($i = 0; $i < $num, $i + +) {$x = Floor ($width/$num) * $i + 2;                        $y = Mt_rand (0, $height-15);        Imagechar ($img, 5, $x, $y, $string [$i], Randpix ($img)); } $func = ' image '.        $type;        $header = ' content-type:image/'. $type;    if (function_exists ($func)) {        Header ($header);        $func ($IMG);         }else {echo ' image type not supported ';        } Imagedestroy ($IMG);    return $string; } function randbg ($img) {return imagecolorallocate ($img, Mt_rand (255), Mt_rand (, 255), Mt_ran    D (130, 255)); } function Randpix ($img) {return imagecolorallocate ($img, Mt_rand (0, +), Mt_rand (0, +), Mt_rand (    0, 120));        }?><!--image scaling and clipping techniques--><?php $image = imagecreatefrompng (' fbb.png ');    $percent = 0.1;        List ($width, $height) = getimagesize (' fbb.png ');    $new _width = $width * $percent;        $new _height = $height * $percent;    $new _image = Imagecreatetruecolor ($new _width, $new _height);    Imagecopyresampled ($new _image, $image, 0, 0, 0, 0, $new _width, $new _height, $width, $height);    Header (' Content-type:image/jpeg '); Imagejpeg ($new _image);?     ><!--Image watermark processing--><?php $DST = imagecreatefrompng (' Http://img.php.cn/upload/course/000/   000/002/5833ebba648cf229.png ');    $SRC = imagecreatefrompng (' http://img.php.cn/upload/course/000/000/002/5833ebe90cc11285.png ');    $DST _info = getimagesize (' 5833ebba648cf229.png ');        $src _info = getimagesize (' 5833ebe90cc11285.png ');    $DST _x = $dst _info[0]-$src _info[0];    $DST _y = $dst _info[1]-$src _info[1];    Imagecopymerge ($DST, $SRC, $dst _x, $dst _y, 0, 0, $src _info[0], $src _info[1], 100);    Header (' content-type:image/png ');    Imagepng ($DST);    Imagedestroy ($DST); Imagedestroy ($SRC);? ><!--do a smart picture watermark function--><?php?>