PHP implements the center crop and zoom image

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 Getimagewidth (); Ten $height = $Image->getimageheight (); 11//Determine if the photo is long and wide equal to the IF ($width! = $height) {13//unequal) first truncate the image center portion with the minimum edge ($width > $height) {1 5 $x = ($width-$height)/2; $y = 0; $width = $height;         }else{$y = ($height-$width)/2; $x = 0; $height = $width; 22 } $Image->crop ($file, $width, $height, $x, $y, $file); 24} 25 26//Proportional zoom picture $dst _w = 100; $DST _h = 100; $Image->reduce ($file, $dst _w, $dst _h, $file); 31?>
 _width = $info [0]; $this->_height = $info [1]; $type = $info [' MIME ']; $type = explode ('/', $type); $this->_type = $type [1]; 44} 45//Return picture type Getimagetype Public function () {$this->_type; 48} 49/  /Return picture width public Function getimagewidth () {return $this->_width; 52} 53//Return picture height function Getimageheight () {return $this->_height; 56} 57 58/* 59 * * Picture Clipping * * $tmp _image  SOURCE file * * * $DST _w the width of the cropped picture * * * $DST the height of the cropped image of _h * * $x at the source map $x coordinates start clipping * * * $y at the source map $y coordinates start clipping 65 */ Crop Public Function ($tmp _image, $dst _w, $dst _h, $x, $y, $path) {$this->_type) {. E ' jpeg ': $src = imagecreatefromjpeg ($tmp _image); a break; Case ' gif ': $src = imagecreatefromgif ($tmp _image); a break;      74       Case ' png ': $src = imagecreatefrompng ($tmp _image); break; $DST = Imagecreatetruecolor ($dst _w, $dst _h); $color = Imagecolorallocate ($DST, 255,255,255); Bayi imagecolortransparent ($DST, $color); Imagefill ($DST, 0,0, $color); $bool = imagecopyresampled ($DST, $SRC, 0,0, $x, $y, $dst _w, $dst _h, $dst _w, $dst _h);                 100 switch ($this->_type) {$ Case ' JPEG ': imagejpeg ($DST, $path, 87); Break Case ' gif ': Imagegif ($DST, $path); a break; "PNG": Imagepng ($DST, $path); a break; 94} Imagedestroy ($SRC); Imagedestroy ($DST); 98 return $bool;     99}100 101/*102 * * Scale picture 103 * * $tmp _image SOURCE Map 104 * * $DST _w scaled picture Width * * $dst _h scaled image Height 106 */107 public Function reduce ($tmp _imAge, $dst _w, $dst _h, $path) {108 switch ($this->_type) {109 case ' jpeg ': $SRC = Imagec Reatefromjpeg ($tmp _image); 111 break;112 case ' gif ': 113 $src = imagecreatefromg if ($tmp _image); break;115 case ' png ': $src = imagecreatefrompng ($tmp _ima         GE); 117 break;118}119 $imagex = Imagesx ($SRC); $imagey = Imagesy ($SRC); 121 $DST = Imagecreatetruecolor ($dst _w, $dst _h), 122 $color = Imagecolorallocate ($DST, 255,255,255); 123 imag Ecolortransparent ($DST, $color); 124 Imagefill ($DST, 0,0, $color); $bool = imagecopyresampled ($DST, $SRC, 0,0 , 0,0, $dst _w, $dst _h, $imagex, $imagey) 126 switch ($this->_type) {127 case ' jpeg ': + IM                 Agejpeg ($DST, $path, +); 129 break;130 case ' gif ': 131 imagegif ($DST, $path); 132 Break;133 case ' PNG ': 134 imagepng ($DST, $path); 135 break;136}137 image Destroy ($SRC); 138 Imagedestroy ($DST); 139 return $bool; 140}141}

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