function.posix-getrlimit.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Return info about system resource limits</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.posix-getpwuid.html">posix_getpwuid</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.posix-getsid.html">posix_getsid</a></div> <div class="up"><a href="ref.posix.html">POSIX Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.posix-getrlimit" class="refentry"> <div class="refnamediv"> <h1 class="refname">posix_getrlimit</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">posix_getrlimit</span> — <span class="dc-title">Return info about system resource limits</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>posix_getrlimit</b></b></span> ( <span class="methodparam">void</span> )</div> <p class="para rdfs-comment"> <b>posix_getrlimit()</b> returns an <a href="language.types.array.html" class="type array">array</a> of information about the current resource's soft and hard limits. </p> <p class="para"> Each resource has an associated soft and hard limit. The soft limit is the value that the kernel enforces for the corresponding resource. The hard limit acts as a ceiling for the soft limit. An unprivileged process may only set its soft limit to a value from 0 to the hard limit, and irreversibly lower its hard limit. </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an associative <a href="language.types.array.html" class="type array">array</a> of elements for each limit that is defined. Each limit has a soft and a hard limit. <table border="5"> <caption><b>List of possible limits returned</b></caption> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Limit name</th> <th colspan="1">Limit description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">core</td> <td colspan="1" rowspan="1" align="left"> The maximum size of the core file. When 0, not core files are created. When core files are larger than this size, they will be truncated at this size. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">totalmem</td> <td colspan="1" rowspan="1" align="left"> The maximum size of the memory of the process, in bytes. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">virtualmem</td> <td colspan="1" rowspan="1" align="left"> The maximum size of the virtual memory for the process, in bytes. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">data</td> <td colspan="1" rowspan="1" align="left"> The maximum size of the data segment for the process, in bytes. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">stack</td> <td colspan="1" rowspan="1" align="left"> The maximum size of the process stack, in bytes. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">rss</td> <td colspan="1" rowspan="1" align="left"> The maximum number of virtual pages resident in RAM </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">maxproc</td> <td colspan="1" rowspan="1" align="left"> The maximum number of processes that can be created for the real user ID of the calling process. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">memlock</td> <td colspan="1" rowspan="1" align="left"> The maximum number of bytes of memory that may be locked into RAM. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">cpu</td> <td colspan="1" rowspan="1" align="left"> The amount of time the process is allowed to use the CPU. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">filesize</td> <td colspan="1" rowspan="1" align="left"> The maximum size of the data segment for the process, in bytes. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">openfiles</td> <td colspan="1" rowspan="1" align="left"> One more than the maximum number of open file descriptors. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Example use of <b>posix_getrlimit()</b></b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br />$limits </span><span style="color: #007700">= </span><span style="color: #0000BB">posix_getrlimit</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$limits</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>Array( [soft core] => 0 [hard core] => unlimited [soft data] => unlimited [hard data] => unlimited [soft stack] => 8388608 [hard stack] => unlimited [soft totalmem] => unlimited [hard totalmem] => unlimited [soft rss] => unlimited [hard rss] => unlimited [soft maxproc] => unlimited [hard maxproc] => unlimited [soft memlock] => unlimited [hard memlock] => unlimited [soft cpu] => unlimited [hard cpu] => unlimited [soft filesize] => unlimited [hard filesize] => unlimited [soft openfiles] => 1024 [hard openfiles] => 1024)</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: This is a not POSIX function, but is common on BSD and System V systems. If the system does not support this function, then it will not be included at compile time. This may be checked with <a href="function.function-exists.html" class="function">function_exists()</a>. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member">man page GETRLIMIT(2)</li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.posix-getpwuid.html">posix_getpwuid</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.posix-getsid.html">posix_getsid</a></div> <div class="up"><a href="ref.posix.html">POSIX Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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