curl-init.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.curl-init" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>curl_init</refname>
  <refpurpose>初始化 cURL 会话</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>CurlHandle</type><type>false</type></type><methodname>curl_init</methodname>
   <methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>url</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   初始化新会话，返回 cURL 句柄。
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>url</parameter></term>
     <listitem>
      <para>
       如果提供了该参数，<constant>CURLOPT_URL</constant> 选项将会被设置成这个值。也可以使用 <function>curl_setopt</function> 函数手动设置这个值。
      </para>
      <note>
       <para>
        如果设置了 <link linkend="ini.open-basedir">open_basedir</link>，<literal>file</literal> 协议会被 cURL 禁用。
       </para>
      </note>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   成功时返回 cURL 句柄，错误时返回 &false;。
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>8.0.0</entry>
      <entry>
       此函数成功时现在返回 <classname>CurlHandle</classname> 实例；之前返回 <type>resource</type>。
      </entry>
     </row>
     <row>
      <entry>8.0.0</entry>
      <entry>
       <parameter>url</parameter> 现在可为 null。
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>
     初始化新 cURL 会话并获取网页
    </title>
    <programlisting role="php">
<![CDATA[
<?php

// 初始化新 cURL 会话
$ch = curl_init();

// 设置 URL 和相应的选项
curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
curl_setopt($ch, CURLOPT_HEADER, 0);

// 抓取 URL 并把它传递给浏览器
curl_exec($ch);

?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>curl_multi_init</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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