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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>Inserts HTML line breaks before all newlines in a string</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.nl-langinfo.html">nl_langinfo</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.number-format.html">number_format</a></div> <div class="up"><a href="ref.strings.html">String Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.nl2br" class="refentry"> <div class="refnamediv"> <h1 class="refname">nl2br</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">nl2br</span> — <span class="dc-title">Inserts HTML line breaks before all newlines in a string</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><b><b>nl2br</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$string</tt></span> [, <span class="methodparam"><span class="type">bool</span> <tt class="parameter">$is_xhtml</tt></span> ] )</div> <p class="para rdfs-comment"> Returns <i><tt class="parameter">string</tt></i> with '<br />' or '<br>' inserted before all newlines. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">string</tt></i></span> <dd> <p class="para"> The input string. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">is_xhtml</tt></i></span> <dd> <p class="para"> Whenever to use XHTML compatible line breaks or not (defaults to <b><tt>TRUE</tt></b>). </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the altered string. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 using <b>nl2br()</b></b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">nl2br</span><span style="color: #007700">(</span><span style="color: #DD0000">"foo isn't\n bar"</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:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>foo isn't<br /> bar</pre></div> </pre></div> </div> <div class="example"> <p><b>Example #2 Generating valid HTML markup using the <i><tt class="parameter">is_xhtml</tt></i> parameter</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">nl2br</span><span style="color: #007700">(</span><span style="color: #DD0000">"Welcome\r\nThis is my HTML document"</span><span style="color: #007700">, </span><span style="color: #0000BB">false</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:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>Welcome<br>This is my HTML document</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">5.3.0</td> <td colspan="1" rowspan="1" align="left"> Added the optional <i><tt class="parameter">is_xhtml</tt></i> parameter. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">4.0.5</td> <td colspan="1" rowspan="1" align="left"> <b>nl2br()</b> is now XHTML compliant. All older versions will return <i><tt class="parameter">string</tt></i> with '<br>' inserted before newlines instead of '<br />'. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.htmlspecialchars.html" class="function" rel="rdfs-seeAlso">htmlspecialchars()</a></li> <li class="member"><a href="function.htmlentities.html" class="function" rel="rdfs-seeAlso">htmlentities()</a></li> <li class="member"><a href="function.wordwrap.html" class="function" rel="rdfs-seeAlso">wordwrap()</a></li> <li class="member"><a href="function.str-replace.html" class="function" rel="rdfs-seeAlso">str_replace()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.nl-langinfo.html">nl_langinfo</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.number-format.html">number_format</a></div> <div class="up"><a href="ref.strings.html">String 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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