mirror of
https://github.com/macintoshplus/doc-en.git
synced 2026-03-24 00:42:18 +01:00
139 lines
4.0 KiB
XML
139 lines
4.0 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.passthru" xmlns="http://docbook.org/ns/docbook">
|
|
<refnamediv>
|
|
<refname>passthru</refname>
|
|
<refpurpose>Execute an external program and display raw output</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsect1 role="description">
|
|
&reftitle.description;
|
|
<methodsynopsis>
|
|
<type class="union"><type>false</type><type>null</type></type><methodname>passthru</methodname>
|
|
<methodparam><type>string</type><parameter>command</parameter></methodparam>
|
|
<methodparam choice="opt"><type>int</type><parameter role="reference">result_code</parameter><initializer>&null;</initializer></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
The <function>passthru</function> function is similar to the
|
|
<function>exec</function> function in that it executes a
|
|
<parameter>command</parameter>. This function
|
|
should be used in place of <function>exec</function> or
|
|
<function>system</function> when the output from the Unix command
|
|
is binary data which needs to be passed directly back to the
|
|
browser. A common use for this is to execute something like the
|
|
pbmplus utilities that can output an image stream directly. By
|
|
setting the Content-type to <literal>image/gif</literal> and
|
|
then calling a pbmplus program to output a gif, you can create
|
|
PHP scripts that output images directly.
|
|
</para>
|
|
</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>
|
|
<varlistentry>
|
|
<term><parameter>result_code</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
If the <parameter>result_code</parameter> argument is present, the
|
|
return status of the Unix command will be placed here.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="returnvalues">
|
|
&reftitle.returnvalues;
|
|
<para>
|
|
&return.nullorfalse;
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1 role="errors">
|
|
&reftitle.errors;
|
|
<para>
|
|
Will emit an <constant>E_WARNING</constant> if <function>passthru</function>
|
|
is unable to execute the <parameter>command</parameter>.
|
|
</para>
|
|
<para>
|
|
Throws a <classname>ValueError</classname> if <parameter>command</parameter>
|
|
is empty or contains null bytes.
|
|
</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>
|
|
If <parameter>command</parameter> is empty or contains null bytes,
|
|
<function>passthru</function> now throws a <classname>ValueError</classname>.
|
|
Previously it emitted an <constant>E_WARNING</constant> and returned &false;.
|
|
</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</informaltable>
|
|
</refsect1>
|
|
|
|
<refsect1 role="notes">
|
|
&reftitle.notes;
|
|
&warn.escapeshell;
|
|
¬e.exec-bg;
|
|
</refsect1>
|
|
|
|
<refsect1 role="seealso">
|
|
&reftitle.seealso;
|
|
<para>
|
|
<simplelist>
|
|
<member><function>exec</function></member>
|
|
<member><function>system</function></member>
|
|
<member><function>popen</function></member>
|
|
<member><function>escapeshellcmd</function></member>
|
|
<member><link linkend="language.operators.execution">backtick operator</link></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
|
|
-->
|