mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-22 03:48:55 +00:00
114 lines
3 KiB
XML
114 lines
3 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
|
|
<!-- $Revision$ -->
|
|
<!-- splitted from ./en/functions/exec.xml, last change in rev 1.2 -->
|
|
<refentry xml:id="function.shell-exec" xmlns="http://docbook.org/ns/docbook">
|
|
<refnamediv>
|
|
<refname>shell_exec</refname>
|
|
<refpurpose>Execute command via shell and return the complete output as a string</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsect1 role="description">
|
|
&reftitle.description;
|
|
<methodsynopsis>
|
|
<type class="union"><type>string</type><type>false</type><type>null</type></type><methodname>shell_exec</methodname>
|
|
<methodparam><type>string</type><parameter>command</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
This function is identical to the <link linkend="language.operators.execution">backtick operator</link>.
|
|
</para>
|
|
<note>
|
|
<para>
|
|
On Windows, the underlying pipe is opened in text mode which can cause the
|
|
function to fail for binary output. Consider to use <function>popen</function>
|
|
instead for such cases.
|
|
</para>
|
|
</note>
|
|
</refsect1>
|
|
|
|
<refsect1 role="parameters">
|
|
&reftitle.parameters;
|
|
<para>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>command</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
The command that will be executed.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="returnvalues">
|
|
&reftitle.returnvalues;
|
|
<para>
|
|
A &string; containing the output from the executed command, &false; if the pipe
|
|
cannot be established or &null; if an error occurs or the command produces no output.
|
|
</para>
|
|
<note>
|
|
<para>
|
|
This function can return &null; both when an error occurs or the program
|
|
produces no output. It is not possible to detect execution failures using
|
|
this function. <function>exec</function> should be used when access to the
|
|
program exit code is required.
|
|
</para>
|
|
</note>
|
|
</refsect1>
|
|
|
|
<refsect1 role="errors">
|
|
&reftitle.errors;
|
|
<para>
|
|
An <constant>E_WARNING</constant> level error is generated
|
|
when the pipe cannot be established.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="examples">
|
|
&reftitle.examples;
|
|
<para>
|
|
<example>
|
|
<title>A <function>shell_exec</function> example</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
$output = shell_exec('ls -lart');
|
|
echo "<pre>$output</pre>";
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="seealso">
|
|
&reftitle.seealso;
|
|
<para>
|
|
<simplelist>
|
|
<member><function>exec</function></member>
|
|
<member><function>escapeshellcmd</function></member>
|
|
</simplelist>
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
<!-- Keep this comment at the end of the file
|
|
Local variables:
|
|
mode: sgml
|
|
sgml-omittag:t
|
|
sgml-shorttag:t
|
|
sgml-minimize-attributes:nil
|
|
sgml-always-quote-attributes:t
|
|
sgml-indent-step:1
|
|
sgml-indent-data:t
|
|
indent-tabs-mode:nil
|
|
sgml-parent-document:nil
|
|
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
|
|
sgml-exposed-tags:nil
|
|
sgml-local-catalogs:nil
|
|
sgml-local-ecat-files:nil
|
|
End:
|
|
vim600: syn=xml fen fdm=syntax fdl=2 si
|
|
vim: et tw=78 syn=sgml
|
|
vi: ts=1 sw=1
|
|
-->
|