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<title>Changed functions</title>
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<h2 class="title">Changed functions</h2>
<div class="sect2" id="migration70.changed-functions.core">
<h3 class="title">PHP Core</h3>
<ul class="itemizedlist">
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<span class="simpara">
<span class="function"><a href="function.debug-zval-dump.html" class="function">debug_zval_dump()</a></span> now prints "int" instead of "long",
and "float" instead of "double"
</span>
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<span class="simpara">
<span class="function"><a href="function.dirname.html" class="function">dirname()</a></span> now optionally takes a second parameter,
<code class="parameter">depth</code>, to get the name of the directory
<code class="parameter">depth</code> levels up from the current directory.
</span>
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<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.getrusage.html" class="function">getrusage()</a></span> is now supported on Windows.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.mktime.html" class="function">mktime()</a></span> and <span class="function"><a href="function.gmmktime.html" class="function">gmmktime()</a></span> functions
no longer accept <code class="parameter">is_dst</code> parameter.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.preg-replace.html" class="function">preg_replace()</a></span> function no longer supports
"\e" (<strong><code>PREG_REPLACE_EVAL</code></strong>). <span class="function"><a href="function.preg-replace-callback.html" class="function">preg_replace_callback()</a></span>
should be used instead.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.setlocale.html" class="function">setlocale()</a></span> function no longer accepts <code class="parameter">category</code>
passed as string. <strong><code>LC_*</code></strong> constants must be used instead.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.exec.html" class="function">exec()</a></span>, <span class="function"><a href="function.system.html" class="function">system()</a></span> and <span class="function"><a href="function.passthru.html" class="function">passthru()</a></span>
functions have NULL byte protection now.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.shmop-open.html" class="function">shmop_open()</a></span> now returns a resource instead of an int,
which has to be passed to <span class="function"><a href="function.shmop-size.html" class="function">shmop_size()</a></span>,
<span class="function"><a href="function.shmop-write.html" class="function">shmop_write()</a></span>, <span class="function"><a href="function.shmop-read.html" class="function">shmop_read()</a></span>,
<span class="function"><a href="function.shmop-close.html" class="function">shmop_close()</a></span> and <span class="function"><a href="function.shmop-delete.html" class="function">shmop_delete()</a></span>.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.substr.html" class="function">substr()</a></span> and <span class="function"><a href="function.iconv-substr.html" class="function">iconv_substr()</a></span> now return an empty string,
if string is equal to start characters long.
</span>
</li>
<li class="listitem">
<span class="simpara">
<span class="function"><a href="function.xml-parser-free.html" class="function">xml_parser_free()</a></span> is no longer sufficient to free the
parser resource, if it references an object and this object references that
parser resource. In this case it is necessary to additionally unset the $parser.
</span>
</li>
</ul>
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