PHP graphics class for convenient watermarks and thumbnails_PHP tutorial

Copy code The code is as follows:

/*
*@author  27262681@qq.com
*copyright http://www.gowake.cn
*/

class img {
function __construct($arg = null) {
$args = func_get_args();
if($arg == null) {
return null;
}
$this->im = call_user_func_array(array($this,'create'),$args);
}

function __call($func,$arg) {
if(function_exists('image'.$func)) {
$funcstr = 'image'.$func;
}elseif (function_exists($func)){
$funcstr = $func;
      } else {  
              error("No such class method or function");                          /*
*Create image
*@param string/int Image file path or width
*@param int Height, can be omitted
*@param string 6-digit hexadecimal integer
*/
function create($arg = null) {
$args = func_get_args();
if(is_file($args[0])) {
$this->file = $args[0 ];
                  $size = getimagesize($this->file) or error('Picture type error'); : $size;
$type = image_type_to_extension($size[2],false);
$this->type = $this->type ? >           $createfunc = 'imagecreatefrom'.$type;
             $im = $createfunc($this->file); args[1]>0) {
                      $im = imagecreatetruecolor((int)$args[0],(int)$args[1]) or error("Sorry, the parameter is wrong! "); " else {
$color = hexdec(str_replace('#','',$args[2]));
     }
      $this->size = $this->size ? $this->size : array((int)$args[0] ,(int)$args[1]);
imagefill($im, 1, 1, $color);
, parameter error!");
}
//imagealphablending($im,false);//These two lines are used to record the transparent channel
imagesavealpha($im,true); );//Enable interlacing
return $im;
}

/*
*Generate thumbnails
*@param int $w Width of new image
* @param int $h The width of the new picture
*@param string/bool $color Optional, the background color of the new picture, false or empty to be transparent
*@param bool $lashen Optional, whether to stretch, The default is not to stretch
*/
function suolue($w = null,$h = null,$color = false,$lashen = false) {
$w_o = imagesx($this->im ); ;
        } elseif ($w != null and $h == null){                                                                                         ;
$im = $this->create($w,$h,$color);
$w_n = $w;
$h_n = $h;
if($w_o/ $h_o > $w/$h) {
$h_n = $w*$h_o/$w_o;
$y = ($h-$h_n)/2;
}elseif ($w_o /$h_o                                                                                        if($lashen) {
               $w_n = $w; 🎜> imagecopyresampled($ im,$this->im,$x,$y,0,0,$w_n,$h_n,$w_o,$h_o);
                         //imagedestroy($this->im);
$this->im = $im;
return $im;
}

/*
*Write on the picture
*@param string $str The string to be written
*@param array $arg String related parameters, which is an associative array. left is the distance from the left, right is the distance from the right, left takes precedence, top is the distance from the top, bottom is the distance from the bottom, top takes precedence; angle is the angle, color is the 6-digit hexadecimal color, touming is the text transparency, font For the font file
*/
function write($str = '' , $arg = array()) {
$size = $arg['size'] ? $arg['size'] : 20;
$angle = $arg['angle'] ? $arg['angle'] : 0 ;
$color = $arg['color'] ? $arg['color'] : '000000 ';
$touming = $arg['touming'] ? $arg['touming'] : 100;
$touming = dechex((100-$touming)*127/100);
$ color = hexdec($touming.str_replace("#","",$color));
$font = $arg['font'] ? $arg['font'] : 'arial.ttf';
$boxarr = imagettfbbox($size,$angle,$font,$str);
$w = imagesx($this->im);
$h = imagesy($this->im );

$x_l = $x_r = $boxarr[0];
$y_t = $y_b = $boxarr[1];
for($i=0;$i                                                                                                  $x_r ? $boxarr[$i] : $x_r; $boxarr[$i+1] > $y_b ? $boxarr[$i+1] : $y_b;
    }
        $width = $x_r - $x_l; $y_t;

/*Get the exact offset*/
$im = $this->create($width*4,$height*4);
$tm = hexdec( '7ffffffff');
imagettftext($im,$size,$angle,$width*2,$height*2,$color,$font,$str);
for($i=0;$ i for($ii=0;$ii if(imagecolorat($im,$i,$ii) ! = $tm) {
                                                                                                                                                         4;$i++) {
for($ii=$x_l;$ii if(imagecolorat($im,$ii,$i) != $tm) { $ Y_t = $ i;
Break (2);
}
}
}
        for($i=$width*4-1;$i>0;$i--) {
            for($ii=$y_t;$ii                if(imagecolorat($im,$i,$ii) != $tm) {
                    $x_r = $i;
                    break(2);
                }
            }
        }
        for($i=$height*4-1;$i>0;$i--) {
            for($ii=$x_l;$ii                if(imagecolorat($im,$ii,$i) != $tm) {
                    $y_b = $i;
                    break(2);
                }
            }
        }
        $x_off = $x_l - $width*2;
        $y_off = $y_b - $height*2;
        $width = $x_r - $x_l; //精确宽度
        $height = $y_b - $y_t; //精确高度
        imagedestroy($im);

        if(isset($arg['left'])) {
            $x = (int)$arg['left'] - $x_off;
        }elseif (isset($arg['right'])){
            $x = $w - (int)$arg['right'] - $width - $x_off;
        }else {
            $x = ($w - $width)/2 - $x_off;
        }
        if(isset($arg['top'])) {
            $y = (int)$arg['top'] - $y_off + $height;
        }elseif (isset($arg['bottom'])){
            $y = $h - (int)$arg['bottom'] - $y_off;
        }else {
            $y = ($h + $height)/2 - $y_off;
        }

        imagettftext($this->im,$size,$angle,$x,$y,$color,$font,$str);
        return $this->im;
    }

    /*
    *合并图片（如图片水影）
    *@param string/resource $file 图片文件路径或这图片标识符
    *@param array $arg 字符串相关的参数，为一个关联数组，left 为距左边距离，right为距右边距离，left优先，top为距顶部距离，bottom为距底部距离，top优先；touming为文字透明度
    */
    function merge($file,$arg = array()) {
        if(is_file($file)) {
            $imc = $this->create($file);
        }elseif(gettype($file)=='resource') {
            $imc = $file;
        }else {
            error("没有图片");
        }
        $touming = $arg['touming'] ? (int)$arg['touming'] : 100 ;
        $w = imagesx($this->im);
        $h = imagesy($this->im);
        $width = imagesx($imc);
        $height = imagesy($imc);
        if(isset($arg['left'])) {
            $x = (int)$arg['left'];
        }elseif (isset($arg['right'])){
            $x = $w - (int)$arg['right'] - $width;
        }else {
            $x = ($w - $width)/2;
        }
        if(isset($arg['top'])) {
            $y = (int)$arg['top'];
        }elseif (isset($arg['bottom'])){
            $y = $h - $height - $arg['bottom'];
        }else {
            $y = ($h - $height)/2;
        }
        imagecopymergegray($this->im,$imc,$x,$y,0,0,$width,$height,$touming);
    }

    /*
    *输出图片
    *@param string $type
    *@param string $filename 要转存的文件路径
    *@param int $zhiliang jpeg图片特有的，图像清晰度
    */
    function display($type = null,$filename = null,$zhiliang = null) {
        if($type == null) {
            $type = $this->type ? $this->type : 'jpg';
        }
        if(($type == 'jpeg' or $type == 'jpg') and $zhiliang == null) {
            $type = 'jpeg';
            $zhiliang = 100;
        }
        if($filename == null) {
            header('Content-type: image/'.$type);
        }
        $displayfunc = 'image'.$type;
        $displayfunc($this->im,$filename,$zhiliang);
        imagedestroy($this->im);
    }

    function randcolor($a,$b) {
        $a = $a>255 ? 255 : (int)$a;
        $a = $a        $b = $b>255 ? 255 : (int)$b;
        $b = $b        for($i=0;$i            $color .= str_pad(dechex(mt_rand($a,$b)), 2, "0", STR_PAD_LEFT);
        }
        return $color;
    }
}

/*
function error($msg,$debug = false) {
    $err = new Exception($msg);
    $str = "

n<span style="color:red">错误:</span>n".print_r($err->getTrace(),1)."n

";
    if($debug == true) {
        file_put_contents(date('Y-m-d').".log",$str);
        return $str;
    }else{
        die($str);
    }
}
*/
?>

这是简单的用法实例

复制代码 代码如下:

$img = new img('a.png');
$m = $img->im;
$im = $img->suolue(100);
$img->im = $m;
$img->suolue(300);
$img->merge($m,array('left'=>0,'top'=>0,'touming'=>60));
$img->merge($im,array('right'=>0,'top'=>0,'touming'=>60));
$img->merge($im,array('left'=>0,'bottom'=>0,'touming'=>60));
$img->merge($im,array('right'=>0,'bottom'=>0,'touming'=>60));

$img->write("春天来了",array('left'=>0,'top'=>0,'size'=>30,'color'=>$img->randcolor(0,180),'angle'=>-45,'font'=>'simfang.ttf','touming'=>80));
$img->write("春天来了",array('left'=>0,'bottom'=>0,'size'=>30,'color'=>$img->randcolor(0,180),'angle'=>45,'font'=>'simfang.ttf','touming'=>80));
$img->write("春天来了",array('right'=>0,'bottom'=>0,'size'=>30,'color'=>$img->randcolor(0,180),'angle'=>-45,'font'=>'simfang.ttf','touming'=>80));
$img->write("春天来了",array('right'=>0,'top'=>0,'size'=>30,'color'=>$img->randcolor(0,180),'angle'=>45,'font'=>'simfang.ttf','touming'=>80));
$img->display("gif");

http://www.bkjia.com/PHPjc/320104.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/320104.htmlTechArticle复制代码 代码如下: ?php /* *@author夜无眠27262681@qq.com *copyrighthttp://www.gowake.cn */ class img { function __construct($arg = null) { $args = func_get_args(); if($a...