头像

php图像裁剪

2018-05-06 14:49:02 来源:PHP代码   浏览()   评论 ( 0 )   

<?php
/**
 * 图像裁剪
 * @param $title string 原图路径
 * @param $content string 需要裁剪的宽
 * @param $encode string 需要裁剪的高
 */
function imagecropper($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;
        $source_y = 0;
    }
    switch ($source_mime)
    {
        case 'image/gif':
            $source_image = imagecreatefromgif($source_path);
            break;
        case 'image/jpeg':
            $source_image = imagecreatefromjpeg($source_path);
            break;
        case 'image/png':
            $source_image = imagecreatefrompng($source_path);
            break;
        default:
            return false;
            break;
    }
    $target_image  = imagecreatetruecolor($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";
    //imagepng($target_image,'./'.$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('./img033.jpg',140,140);
imagecropper('./img033.jpg',55,55);
?>


标签: php
声明:转载请注明来源(PHP代码)并保留原文链接:https://www.phpdaima.com//master-104.html
广告不存在
评论0

后面还有条评论,点击查看>>

温馨提示:为规范评论内容,垃圾评论一律封号...