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Homephp教程php手册php强制更新图片缓存的方法

这篇文章主要介绍了php强制更新图片缓存的方法,实例分析了php结合javascript方法实现针对图片缓存的强制更新功能,非常具有实用价值,需要的朋友可以参考下

本文实例讲述了php强制更新图片缓存的方法。分享给大家供大家参考。具体实现方法如下:

复制代码 代码如下:

/** 強制更新圖片緩存
*   @param Array $files 要更新的圖片
*   @param int $version 版本
*/ 
function force_reload_file($files=array(), $version=0){ 
    $html = ''; 
    if(!isset($_COOKIE['force_reload_page_'.$version])){ // 判斷是否已更新過 
        setcookie('force_reload_page_'.$version, true, time()+2592000); 
        $html .= ''; 
        echo $html; 
        exit(); 
    }else{  // 讀取圖片一次,針對chrome優化 
        if($files){ 
            $html .= ''; 
        } 
    } 
    return $html; 

 
// 调用方法 
$files = array( 
    'images/1.jpg', 
    'images/2.jpg', 
    'images/3.jpg', 
    'images/4.jpg' 
); 
$html = force_reload_file($files, 1); 
echo $html;

希望本文所述对大家的php程序设计有所帮助。

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