• 文件路径：`..\vendor\pear\net_socket\Net\Socket.php`
• 代码位置：约 156 行

```php
$openfunc = $this->persistent ? 'fsockopen' : 'fsockopen';
$errno = 0;
$errstr = '';

$old_track_errors = @ini_set('track_errors', 1);

if ($timeout <= 0) {
    $timeout = @ini_get('default_socket_timeout');
}

if ($options && function_exists('stream_context_create')) {
    $context = stream_context_create($options);

    // Since PHP 5 fsockopen doesn't allow context specification
    if (function_exists('stream_socket_client')) {
        $flags = STREAM_CLIENT_CONNECT;