1 <?php 2 3 /** 4 * 图像裁剪 5 * @param $source_path 原图路径 6 * @param $target_width 需要裁剪的宽 7 * @param $target_height 需要裁剪的高 8 * @return bool 9 */ 10 function imagecropper($source_path, $target_width, $target_height) 11 { 12 $source_info = getimagesize($source_path); 13 $source_width = $source_info[0]; 14 $source_height = $source_info[1]; 15 $source_mime = $source_info['mime']; 16 $source_ratio = $source_height / $source_width; 17 $target_ratio = $target_height / $target_width; 18 19 // 源图过高 20 if ($source_ratio > $target_ratio) { 21 $cropped_width = $source_width; 22 $cropped_height = $source_width * $target_ratio; 23 $source_x = 0; 24 $source_y = ($source_height - $cropped_height) / 2; 25 } // 源图过宽 26 elseif ($source_ratio < $target_ratio) { 27 $cropped_width = $source_height / $target_ratio; 28 $cropped_height = $source_height; 29 $source_x = ($source_width - $cropped_width) / 2; 30 $source_y = 0; 31 } // 源图适中 32 else { 33 $cropped_width = $source_width; 34 $cropped_height = $source_height; 35 $source_x = 0; 36 $source_y = 0; 37 } 38 $funcList = array( 39 'image/gif' => array( 40 'create' => 'imagecreatefromgif', 41 'make' => 'imagegif', 42 'mime' => '.gif', 43 ), 44 'image/jpeg' => array( 45 'create' => 'imagecreatefromjpeg', 46 'make' => 'imagejpeg', 47 'mime' => '.jpg', 48 ), 49 'image/png' => array( 50 'create' => 'imagecreatefrompng', 51 'make' => 'imagepng', 52 'mime' => '.png', 53 ), 54 ); 55 if (isset($funcList[$source_mime])) { 56 $curFunc = $funcList[$source_mime]; 57 } else { 58 return FALSE; 59 } 60 $source_image = $curFunc['create']($source_path); 61 62 $target_image = imagecreatetruecolor($target_width, $target_height); 63 $cropped_image = imagecreatetruecolor($cropped_width, $cropped_height); 64 65 // 裁剪 66 imagecopy($cropped_image, $source_image, 0, 0, $source_x, $source_y, $cropped_width, $cropped_height); 67 // 缩放 68 imagecopyresampled($target_image, $cropped_image, 0, 0, 0, 0, $target_width, $target_height, $cropped_width, $cropped_height); 69 70 //保存图片到本地(两者选一) 71 $randNumber = mt_rand(00000, 99999) . mt_rand(000, 999); 72 //$fileName = substr(md5($randNumber), 8, 16) . ".png"; 73 $fileName = time() . '_' . substr(md5($randNumber), 8, 16) . $curFunc['mime']; 74 //imagepng($target_image, './' . $fileName); 75 //imagepng($target_image, './' . $fileName); 76 //$imgFunc2($target_image, './' . $fileName); 77 $curFunc['make']($target_image, './' . $fileName); 78 imagedestroy($target_image); 79 80 //直接在浏览器输出图片(两者选一) 81 /*header('Content-Type: image/jpeg'); 82 imagepng($target_image); 83 imagedestroy($target_image); 84 imagejpeg($target_image); 85 imagedestroy($source_image); 86 imagedestroy($target_image); 87 imagedestroy($cropped_image);*/ 88 } 89 90 //调用 91 //imagecropper('./img033.jpg',300,300); 92 imagecropper('./4.jpg', 140, 140); 93 //imagecropper('./img033.jpg',55,55); 94 ?>
<?php
/**
* 图像裁剪
* @param $source_path 原图路径
* @param $target_width 需要裁剪的宽
* @param $target_height 需要裁剪的高
* @return bool
*/
function imagecropper($source_path, $target_width, $target_height)
{
$source_info = getimagesize($source_path);
$source_width = $source_info[0];
$source_height = $source_info[1];
$source_mime = $source_info['mime'];
$source_ratio = $source_height / $source_width;
$target_ratio = $target_height / $target_width;
// 源图过高
if ($source_ratio > $target_ratio) {
$cropped_width = $source_width;
$cropped_height = $source_width * $target_ratio;
$source_x = 0;
$source_y = ($source_height - $cropped_height) / 2;
} // 源图过宽
elseif ($source_ratio < $target_ratio) {
$cropped_width = $source_height / $target_ratio;
$cropped_height = $source_height;
$source_x = ($source_width - $cropped_width) / 2;
$source_y = 0;
} // 源图适中
else {
$cropped_width = $source_width;
$cropped_height = $source_height;
$source_x = 0;
$source_y = 0;
}
$funcList = array(
'image/gif' => array(
'create' => 'imagecreatefromgif',
'make' => 'imagegif',
'mime' => '.gif',
),
'image/jpeg' => array(
'create' => 'imagecreatefromjpeg',
'make' => 'imagejpeg',
'mime' => '.jpg',
),
'image/png' => array(
'create' => 'imagecreatefrompng',
'make' => 'imagepng',
'mime' => '.png',
),
);
if (isset($funcList[$source_mime])) {
$curFunc = $funcList[$source_mime];
} else {
return FALSE;
}
$source_image = $curFunc['create']($source_path);
$target_image = imagecreatetruecolor($target_width, $target_height);
$cropped_image = imagecreatetruecolor($cropped_width, $cropped_height);
// 裁剪
imagecopy($cropped_image, $source_image, 0, 0, $source_x, $source_y, $cropped_width, $cropped_height);
// 缩放
imagecopyresampled($target_image, $cropped_image, 0, 0, 0, 0, $target_width, $target_height, $cropped_width, $cropped_height);
//保存图片到本地(两者选一)
$randNumber = mt_rand(00000, 99999) . mt_rand(000, 999);
//$fileName = substr(md5($randNumber), 8, 16) . ".png";
$fileName = time() . '_' . substr(md5($randNumber), 8, 16) . $curFunc['mime'];
//imagepng($target_image, './' . $fileName);
//imagepng($target_image, './' . $fileName);
//$imgFunc2($target_image, './' . $fileName);
$curFunc['make']($target_image, './' . $fileName);
imagedestroy($target_image);
//直接在浏览器输出图片(两者选一)
/*header('Content-Type: image/jpeg');
imagepng($target_image);
imagedestroy($target_image);
imagejpeg($target_image);
imagedestroy($source_image);
imagedestroy($target_image);
imagedestroy($cropped_image);*/
}
//调用
//imagecropper('./img033.jpg',300,300);
imagecropper('./4.jpg', 140, 140);
//imagecropper('./img033.jpg',55,55);
?>