pdo文字水印类，验证码类，缩略图类，logo类

<?php
/**
 * webrx.cn  qq:7031633
* @author webrx
* @copyright  copyright (c) 2003-2014   webrx Inc. (http://www.webrx.cn)
* @version    2014-9-7   webrx@126.com
*/
class Image {
    private $f;
    private $i;
    private $path;
    public function __construct($i = ‘‘) {
        $this->f = dirname ( __FILE__ ) . ‘/f.ttf‘;
        if (empty ( $i )) {
        } else {
            $this->i = imagecreatefromjpeg ( $i );
            $this->path = $i;
        }
    }
    public function check($len = 4) {
        session_start ();
        header ( ‘content-type:image/png‘ );
        $fs = [
            ‘/a.ttf‘,
            ‘/b.ttf‘,
            ‘/f.ttf‘
        ];
        $font = dirname ( __FILE__ ) . $fs [mt_rand ( 0, 1 )];
        $w = 35 * $len;
        $h = 50;
        $this->i = imagecreatetruecolor ( $w, $h );
        $c = imagecolorallocatealpha ( $this->i, 0, 0, 0, 127 );
        // imagecolortransparent($i,$c);
        // imagefill($i,0,0,$c);
        imagefilledrectangle ( $this->i, 0, 0, $w, $h, $this->gc ( $this->i, ‘ffffff‘, mt_rand ( 0, 2 ) ) );
        $sss = ‘‘;
        for($j = 0; $j < $len; $j ++) {
            $st = $this->gs ( 1 );
            $sss .= $st;
            imagettftext ( $this->i, mt_rand ( 15, 25 ), mt_rand ( - 30, 30 ), $j * 35 + 10, mt_rand ( 28, 38 ), $this->gc ( $this->i ), $font, $st );
        }
        $_SESSION [‘code‘] = $sss;
        imagesetthickness ( $this->i, mt_rand ( 2, 8 ) );
        for($j = 0; $j < mt_rand ( 5, 10 ); $j ++) {
            imagefilledarc ( $this->i, mt_rand ( 0, $w ), mt_rand ( 0, $h ), mt_rand ( 0, $w ), mt_rand ( 0, $h ), mt_rand ( 0, 360 ), mt_rand ( 0, 360 ), $this->gc ( $this->i, ‘rand‘, mt_rand ( 100, 120 ) ), IMG_ARC_NOFILL );
        }
        for($j = 0; $j < 10; $j ++) {
            imagettftext ( $this->i, mt_rand ( 10, 15 ), mt_rand ( - 5, 5 ), mt_rand ( 0, $w ), mt_rand ( 0, $h ), $this->gc ( $this->i, ‘rand‘, mt_rand ( 100, 120 ) ), $font, $this->gs ( 1 ) );
        }
        imagepng ( $this->i );
    }
    public function gs($n = 4) {
        $s = ‘abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789‘;
        $t = ‘‘;
        for($i = 0; $i < $n; $i ++) {
            $t .= substr ( $s, mt_rand ( 0, strlen ( $s ) - 1 ), 1 );
        }
        return $t;
    }
    public function setImg($i) {
        $this->i = imagecreatefromjpeg ( $i );
        $this->path = $i;
    }
    public function text($s = 30, $t = ‘版权所有‘, $c = ‘rand‘, $a = 0, $p = 5, $f = true, $fn = ‘t_‘) {
        $ii = getimagesize ( $this->path );
        if ($ii [2] == 2) {
            if ($ii [0] > 300) {
                $pos = imagettfbbox ( $s, 0, $this->f, $t );
                $pad = 30;
                switch ($p) {
                    case 1 : // 左上角
                        $x = 0 - $pos [0] + $pad;
                        $y = 0 - $pos [7] + $pad;
                        break;
                    case 2 : // 上边 水平中央
                        $x = ($ii [0] - $pos [2]) / 2;
                        $y = 0 - $pos [7] + $pad;
                        break;
                    case 3 :
                        $x = $ii [0] - $pos [2] - $pad;
                        $y = 0 - $pos [7] + $pad;
                        break;
                    case 4 :
                        $x = 0 - $pos [0] + $pad;
                        $y = ($ii [1] - $pos [6]) / 2;
                        break;
                    case 5 :
                        $x = ($ii [0] - $pos [2]) / 2;
                        $y = ($ii [1] - $pos [6]) / 2;
                        break;
                    case 6 :
                        $x = $ii [0] - $pos [2] - $pad;
                        $y = ($ii [1] - $pos [6]) / 2;
                        break;
                        	
                    case 7 :
                        $x = 0 - $pos [0] + $pad;
                        $y = $ii [1] - $pos [6] - $pad;
                        break;
                        	
                    case 8 :
                        $x = ($ii [0] - $pos [2]) / 2;
                        $y = $ii [1] - $pos [6] - $pad;
                        break;
                        	
                    case 9 :
                        $x = $ii [0] - $pos [2] - $pad;
                        $y = $ii [1] - $pos [6] - $pad;
                        break;
                }
                imagettftext ( $this->i, $s, 0, $x, $y, $this->gc ( $this->i, $c, $a ), $this->f, $t );
                if ($f) {
                    imagejpeg ( $this->i, $this->path );
                } else {
                    $path = dirname ( $this->path ) . ‘/‘;
                    $name = $fn . substr ( $this->path, strrpos ( $this->path, ‘/‘ ) + 1 );
                    imagejpeg ( $this->i, $path . $name );
                }
            }
        }
    }
    public function logo($p = 5, $f = true, $fn = ‘logo_‘) {
        $ii = getimagesize ( $this->path );
        if ($ii [2] == 2) {
            if ($ii [0] > 300) {
                $w = $ii [0];
                $h = $ii [1];
                // 水银图标 logo.png 格式
                $logo = dirname ( __FILE__ ) . ‘/logo.png‘;
                $li = imagecreatefrompng ( $logo );
                $liw = imagesx ( $li );
                $lih = imagesy ( $li );
                $x = ($w - $liw) / 2;
                $y = ($h - $lih) / 2;
                $pad = 35;
                switch ($p) {
                    case 1 :
                        $x = 0 + $pad;
                        $y = 0 + $pad;
                        break;
                        	
                    case 2 :
                        $y = 0 + $pad;
                        break;
                        	
                    case 3 :
                        $x = $w - $liw - $pad;
                        $y = 0 + $pad;
                        break;
                        	
                    case 4 :
                        $x = 0 + $pad;
                        break;
                        	
                    case 6 :
                        $x = $w - $liw - $pad;
                        break;
                        	
                    case 7 :
                        $x = 0 + $pad;
                        $y = $h - $lih - $pad;
                        break;
                        	
                    case 8 :
                        $y = $h - $lih - $pad;
                        break;
                        	
                    case 9 :
                        $x = $w - $liw - $pad;
                        $y = $h - $lih - $pad;
                        break;
                }
                imagecopy ( $this->i, $li, $x, $y, 0, 0, $liw, $lih );
                if ($f) {
                    imagejpeg ( $this->i, $this->path );
                } else {
                    $path = dirname ( $this->path ) . ‘/‘;
                    $name = $fn . substr ( $this->path, strrpos ( $this->path, ‘/‘ ) + 1 );
                    imagejpeg ( $this->i, $path . $name );
                }
                imagedestroy ( $li );
            }
        }
    }
    public function thumb($f = false, $w = 220, $h = 0, $fn = ‘s_‘) {
        $ii = getimagesize ( $this->path );
        if ($ii [2] == 2) {
            if ($ii [0] > $w) {
                $sw = $ii [0];
                $sh = $ii [1];
                $h = $h == 0 ? $w / $sw * $sh : $h;
                $dst = imagecreatetruecolor ( $w, $h );
                imagecopyresampled ( $dst, $this->i, 0, 0, 0, 0, $w, $h, $sw, $sh );
                if ($f) {
                    imagejpeg ( $dst, $this->path );
                } else {
                    $path = dirname ( $this->path ) . ‘/‘;
                    $name = $fn . substr ( $this->path, strrpos ( $this->path, ‘/‘ ) + 1 );
                    imagejpeg ( $dst, $path . $name );
                }
                imagedestroy ( $dst );
            }
        }
    }
    public function gc($i, $c = ‘rand‘, $a = 0) {
        $color = ‘‘;
        switch ($c) {
            case ‘white‘ :
                $color = imagecolorallocatealpha ( $i, 255, 255, 255, $a );
                break;
            case ‘black‘ :
                $color = imagecolorallocatealpha ( $i, 0, 0, 0, $a );
                break;
            case ‘red‘ :
                $color = imagecolorallocatealpha ( $i, 255, 0, 0, $a );
                break;
            case ‘green‘ :
                $color = imagecolorallocatealpha ( $i, 0, 255, 0, $a );
                break;
            case ‘rand‘ :
                $color = imagecolorallocatealpha ( $i, mt_rand ( 0, 255 ), mt_rand ( 0, 255 ), mt_rand ( 0, 255 ), $a );
                break;
            default :
                $cc = str_split ( $c, 2 );
                $color = imagecolorallocatealpha ( $i, hexdec ( $cc [0] ), hexdec ( $cc [1] ), hexdec ( $cc [2] ), $a );
                break;
        }
        return $color;
    }
    public function __destruct() {
        if (isset ( $this->i )) {
            imagedestroy ( $this->i );
        }
    }
}

<?php 
 include ‘inc/Image.class.php‘;
 $i=new Image(‘c:/a.jpg‘);
 $i->text();
 
 

<?php 
 include ‘inc/Image.class.php‘;
 $i=new Image(‘c:/a.jpg‘);
 $i->text();
 
 $i->setImg(‘c:/b.jpg‘);
 $i->text(50);
 
 $i->setImg(‘c:/c.jpg‘);
 $i->text(100);
 

<?php 
 include ‘inc/Image.class.php‘;
 $i=new Image();
$i->check(4);
 
 

<?php 
 include ‘inc/Image.class.php‘;
 $i=new Image();
$i->setImg(‘c:/d.jpg‘);
$i->thumb(false,200);

<?php 
 include ‘inc/Image.class.php‘;
 $i=new Image();
$i->setImg(‘c:/d.jpg‘);
$i->logo();
 
 

<?php 
 include ‘inc/Image.class.php‘;
 $i=new Image();
$i->setImg(‘c:/d.jpg‘);
$i->logo(5,false);  //5 表示位置，false表示新建一张图片