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new fiunction count_chars()

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@17180 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Thies C. Arntzen 1999-12-14 04:13:10 +00:00
parent 2a56b4f1b9
commit 52d5d29b8d
1 changed files with 46 additions and 1 deletions
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47
functions/strings.xml
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@ -150,7 +150,7 @@ $str = sprintf("The string ends in escape: %c", 27);
</refsect1>
</refentry>
<refentry id="function.chunk-split">
<refnamediv>
<refname>chunk_split</refname>
@ -230,6 +230,51 @@ $new_string = chunk_split(base64_encode($data));
</refsect1>
</refentry>
<refentry id="function.count_chars">
<refnamediv>
<refname>count_chars</refname>
<refpurpose>Return information abouts characters used in a string</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<funcsynopsis>
<funcdef>mixed <function>count_chars</function></funcdef>
<paramdef>string <parameter>string</parameter></paramdef>
<parameter><optional>mode</optional></parameter>
</funcsynopsis>
<para>
Counts the number of occurances of every byte-value (0..255) in
<parameter>string</parameter> and returns it in various ways.
The optional parameter <parameter>Mode</parameter> default to 0. Depending on
<parameter>mode</parameter> <function>count_chars</function> returns one of the following:
<itemizedlist>
<listitem><simpara>
0 - an array with the byte-value as key and the freqency of every byte as value.
</simpara></listitem>
<listitem><simpara>
1 - same as 0 but only byte-values with a frequency greater zero are listed.
</simpara></listitem>
<listitem><simpara>
2 - same as 0 but only byte-values with a frequency equal to zero are listed.
</simpara></listitem>
<listitem><simpara>
3 - a string containing all used byte-values is returned.
</simpara></listitem>
<listitem><simpara>
4 - a string containing all not used byte-values is returned.
</simpara></listitem>
</itemizedlist></para>
<note>
<para>
This function was added in PHP 4.0.
</para>
</note>
</refsect1>
</refentry>
<refentry id="function.crypt">
<refnamediv>
<refname>crypt</refname>