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* Delete entities.functions.xml * Update escapeshellarg.xml * Update escapeshellcmd.xml * Update exec.xml * Update proc-close.xml * Update proc-get-status.xml * Update proc-get-status.xml * Update proc-nice.xml * Update proc-terminate.xml * Update shell-exec.xml * Update system.xml * Update exec.xml * Update proc-open.xml * Update escapeshellarg.xml * Update escapeshellcmd.xml * Update exec.xml * Update proc-get-status.xml * Update proc-nice.xml * Update proc-terminate.xml * Update proc-terminate.xml * Update shell-exec.xml * Update system.xml
114 lines
3.0 KiB
XML
114 lines
3.0 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 7973fd533364af4dd6282ca9e7bee2dffec39b1c Maintainer: yuanyuqiang Status: ready -->
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<!-- CREDITS: mowangjuanzi -->
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<!-- splitted from ./en/functions/exec.xml, last change in rev 1.2 -->
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<refentry xml:id="function.shell-exec" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>shell_exec</refname>
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<refpurpose>通过 shell 执行命令并将完整的输出以字符串的方式返回</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type class="union"><type>string</type><type>false</type><type>null</type></type><methodname>shell_exec</methodname>
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<methodparam><type>string</type><parameter>command</parameter></methodparam>
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</methodsynopsis>
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<para>
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本函数同<link linkend="language.operators.execution">执行运算符</link>。
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</para>
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<note>
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<para>
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在 Windows 上，底层管道以文本模式打开，这可能导致函数无法进行二进制输出。考虑使用
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<function>popen</function> 避免这种情况。
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</para>
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</note>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>command</parameter></term>
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<listitem>
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<para>
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要执行的命令。
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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&string; 包含已执行命令的输出，如果无法建立管道，则为
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&false;，如果发生错误或者命令不产生输出则为 &null;
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</para>
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<note>
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<para>
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当进程执行过程中发生错误，或者进程不产生输出的情况下，都会返回
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&null;。使用本函数无法检测执行是否成功。当需要访问程序退出代码时，应使用
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<function>exec</function>。
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</para>
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</note>
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</refsect1>
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<refsect1 role="errors">
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&reftitle.errors;
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<para>
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无法建立管道时会产生 <constant>E_WARNING</constant> 级别的错误。
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title><function>shell_exec</function> 示例</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$output = shell_exec('ls -lart');
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echo "<pre>$output</pre>";
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>exec</function></member>
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<member><function>escapeshellcmd</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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