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PHP判断网络文件存在

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Release: 2016-05-25 17:10:44
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方法一:

 
<?php
    $url = "http://http://github.codeigniter.org.cn/download/CodeIgniter_2.1.2.zip";
    $fileExists = @file_get_contents($url, null, null, -1, 1) ? true : false;
    echo $fileExists; //返回1,就说明文件存在。
?>
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方法二:

 
<?php
function check_remote_file_exists($url) {
    $curl = curl_init($url); // 不取回数据
    curl_setopt($curl, CURLOPT_NOBODY, true);
    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, &#39;GET&#39;); // 发送请求
    $result = curl_exec($curl);
    $found = false; // 如果请求没有发送失败
    if ($result !== false) {
 
        /** 再检查http响应码是否为200 */
        $statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
        if ($statusCode == 200) {
            $found = true;
        }
    }
    curl_close($curl);
 
    return $found;
}
 
$url = "http://github.codeigniter.org.cn/download/CodeIgniter_2.1.2.zip";
echo check_remote_file_exists($url); // 返回1,说明存在。
 
?>
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