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<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>3.3. Function</title><link rel="stylesheet" type="text/css" href="..//docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><meta name="keywords" content="php, pear, pecl, phar" /><link rel="home" href="../index.html" title="Netkiller PHP 手札" /><link rel="up" href="index.html" title="第 3 章 Function Reference" /><link rel="prev" href="php.array.html" title="3.2. Array 数组" /><link rel="next" href="soap.html" title="3.4. Web Services / SOAP" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">3.3. Function</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="php.array.html">上一页</a> </td><th width="60%" align="center">第 3 章 Function Reference</th><td width="20%" align="right"> <a accesskey="n" href="soap.html">下一页</a></td></tr></table><hr /></div><table xmlns="" width="100%" border="0"><tr><td align="left"><a href="http://netkiller.github.io/">Home</a> |

<a href="http://netkiller.sourceforge.net/">Mirror</a> |

<a href="/search.html">Search</a></td><td><a href="http://netkiller-github-com.iteye.com/">ITEYE 博客</a> |

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<a href="http://rline.blog.51cto.com/">51CTO 博客</a></td><td><form id="searchbox_008589143145807374698:f5uprauilyy" action="/search.html"><input type="hidden" name="cx" value="008589143145807374698:f5uprauilyy" /><input type="hidden" name="cof" value="FORID:11" /><input name="q" type="text" size="25" style="border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: rgb(126, 157, 185); border-right-color: rgb(126, 157, 185); border-bottom-color: rgb(126, 157, 185); border-left-color: rgb(126, 157, 185); padding-top: 2px; padding-right: 2px; padding-bottom: 2px; padding-left: 2px; background-image: url(http://www.google.com/cse/intl/en/images/google_custom_search_watermark.gif); background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(255, 255, 255); background-position: 0% 50%; background-repeat: no-repeat no-repeat; " /><input type="submit" name="sa" value="Search" /><input name="siteurl" type="hidden" value="http://netkiller.sourceforge.net/" /></form><script type="text/javascript" src="http://www.google.com/coop/cse/brand?form=searchbox_008589143145807374698%3Af5uprauilyy"></script></td></tr></table><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="php.function"></a>3.3. Function</h2></div></div></div>

<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="idp62523440"></a>3.3.1. 列出所有function</h3></div></div></div>

<?php

$extensions = get_loaded_extensions();

foreach($extensions as $each_ext)

{

echo "\t<keyword>$each_ext, ";

$ext_funcs = get_extension_funcs($each_ext);

foreach($ext_funcs as $func)

{

echo "$func, ";

}

echo "</keyword>\r\n";

}

</pre>

</div>

@ini_set('memory_limit', '16M');

</pre>

</div>

<?php

echo ini_get('short_open_tag');

</pre>

</div>

<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="set_include_path"></a>3.3.3. PHP Option</h3></div></div></div>

<p>include_path</p>

<?php

$path = '/usr/lib/pear';

set_include_path(get_include_path() . PATH_SEPARATOR . $path);

</pre>

</div>

<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="php_uname"></a>3.3.4. 操作系统类型</h3></div></div></div>

php_uname();

PHP_OS

DIRECTORY_SEPARATOR

PHP_SHLIB_SUFFIX

PATH_SEPARATOR

for example：

if(PATH_SEPARATOR==':'){

echo 'Linux';

}else{

else echo 'Windows';

}

</pre>

</div>

if(strftime('%Y-%m-%d',strtotime('2009-04-19')) <= date('Y-m-d')){

to-do ...

}

</pre>

</div>

if(rand(0,99)>50){

}else{

}

</pre>

<p>生成随机IP地址</p>

<?php

$min=1;

$min=254;

$ipaddr = rand($min,$max).'.'.rand($min,$max).'.'.rand($min,$max).'.'.rand($min,$max);

//$ipaddr = '111.'.rand($min,$max).'.'.rand($min,$max).'.'.rand($min,$max);

echo $ipaddr;

</pre>

</div>

<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="header"></a>3.3.7. header</h3></div></div></div>

// See related links for more status codes

// Use this header instruction to fix 404 headers

// produced by url rewriting...

header('HTTP/1.1 200 OK');

// Page was not found:

header('HTTP/1.1 404 Not Found');

// Access forbidden:

header('HTTP/1.1 403 Forbidden');

// The page moved permanently should be used for

// all redrictions, because search engines know

// what's going on and can easily update their urls.

header('HTTP/1.1 301 Moved Permanently');

// Server error

header('HTTP/1.1 500 Internal Server Error');

// Redirect to a new location:

header('Location: http://www.example.org/');

// Redriect with a delay:

header('Refresh: 10; url=http://www.example.org/');

print 'You will be redirected in 10 seconds';

// you can also use the HTML syntax:

// <meta http-equiv="refresh" content="10;http://www.example.org/ />

// override X-Powered-By value

header('X-Powered-By: PHP/4.4.0');

header('X-Powered-By: Brain/0.6b');

// content language (en = English)

header('Content-language: en');

// last modified (good for caching)

$time = time() - 60; // or filemtime($fn), etc

header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');

// header for telling the browser that the content

// did not get changed

header('HTTP/1.1 304 Not Modified');

// set content length (good for caching):

header('Content-Length: 1234');

// Headers for an download:

header('Content-Type: application/octet-stream');

header('Content-Disposition: attachment; filename="example.zip"');

header('Content-Transfer-Encoding: binary');

// load the file to send:

readfile('example.zip');

// Disable caching of the current document:

header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');

header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past

header('Pragma: no-cache');

// set content type:

header('Content-Type: text/html; charset=iso-8859-1');

header('Content-Type: text/html; charset=utf-8');

header('Content-Type: text/plain'); // plain text file

header('Content-Type: image/jpeg'); // JPG picture

header('Content-Type: application/zip'); // ZIP file

header('Content-Type: application/pdf'); // PDF file

header('Content-Type: audio/mpeg'); // Audio MPEG (MP3,...) file

header('Content-Type: application/x-shockwave-flash'); // Flash animation

// show sign in box

header('HTTP/1.1 401 Unauthorized');

header('WWW-Authenticate: Basic realm="Top Secret"');

print 'Text that will be displayed if the user hits cancel or ';

print 'enters wrong login data';

</pre>

</div>

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