場景：在調用第三方接口時經常需要使用到curl進行數據交互，在初次使用時遇到一些小問題，記錄下來隨時查閱。

封裝curl相關方法便於使用，方法如下：

/**
 * @param $url
 * @param string $error
 * @param array|string $post
 * @param int $timeout
 * @param null $ref
 * @param string $ua
 * @param $contentType
 * @return bool|mixed
 */
function xcurl($url, &$error = "", $post
 
 = array(), $timeout = 5, $ref = null, $ua = "Mozilla/5.0 (X11; Linux x86_64; rv:2.2a1pre) Gecko/20110324 Firefox/4.2a1pre", $contentType) {
    $ch           = curl_init();

    if(!empty($ref)) {
        curl_setopt($ch, CURLOPT_REFERER, $ref);
    }

    curl_setopt($ch, CURLOPT_AUTOREFERER, true);
    curl_setopt(
 
$ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);

    if (false !== stripos($url, "https://")) {                #
 
 https處理，不校驗相關證書
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    }

    if(!empty($ua)) {
        curl_setopt($ch, CURLOPT_USERAGENT, $ua);
    }

    if(count($post) > 0){
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
    }

    if (‘json‘ == $contentType) {
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(‘Content-Type: application/json‘, ‘Content-Length: ‘ . strlen($post)));
    }

    $output       = curl_exec($ch);
    if ($output === false) {
        $error    = curl_error($ch);
        curl_close($ch);
        return false;
    } else {
        curl_close($ch);
        return $output;
    }
}

調用如下：

<?

$url = ‘localhost/php/server.php‘;
$error = ‘‘;
$post = [
    ‘hello‘ => ‘world‘,
    ‘lang‘ => ‘php‘,
];
$post = json_encode($post);

$result = xcurl($url,$error, $post, 5, null, ‘Mozilla/5.0 (X11; Linux x86_64; rv:2.2a1pre) Gecko/20110324 Firefox/4.2a1pre‘, ‘json‘);

var_dump($result);

本地服務接受參數時遇到了問題，無論$_POST還是$_REQUEST都無法獲取curl客戶端發送的json，所以改用file_get_contents來獲取，代碼：

print_r(file_get_contents(‘php://input‘));

最終請求curl.php獲取到結果為：

/code/php/curl.php:19:string

 ‘{"hello":"world","lang":"php"}‘ (length=30)

php中使用curl來post一段json數據