HTTP 函数
PHP 手册

http_support

(PECL pecl_http >= 0.15.0)

http_supportCheck built-in HTTP support

说明

int http_support ([ int $feature = 0 ] )

Check for features that require external libraries.

See the feature support constants table for possible values for the feature argument.

参数

feature

feature to probe for

返回值

Returns integer, whether requested feature is supported, or a bitmask with all supported features if feature was omitted.

范例

Example #1 A http_support() example

<?php
if (!http_support(HTTP_SUPPORT_REQUESTS)) {
    die(
"Need HTTP request support!\n");
}
?>


HTTP 函数
PHP 手册