mirror of
https://github.com/sigmasternchen/php-doc-en
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e095023e40
Partial merge of https://github.com/php/doc-en/pull/265. git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@351904 c90b9560-bf6c-de11-be94-00142212c4b1
226 lines
6.8 KiB
XML
226 lines
6.8 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.substr-replace" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>substr_replace</refname>
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<refpurpose>Replace text within a portion of a string</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type class="union"><type>string</type><type>array</type></type><methodname>substr_replace</methodname>
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<methodparam><type class="union"><type>array</type><type>string</type></type><parameter>string</parameter></methodparam>
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<methodparam><type class="union"><type>array</type><type>string</type></type><parameter>replace</parameter></methodparam>
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<methodparam><type class="union"><type>array</type><type>int</type></type><parameter>offset</parameter></methodparam>
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<methodparam choice="opt"><type class="union"><type>array</type><type>int</type><type>null</type></type><parameter>length</parameter><initializer>&null;</initializer></methodparam>
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</methodsynopsis>
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<para>
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<function>substr_replace</function> replaces a copy of
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<parameter>string</parameter> delimited by the
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<parameter>offset</parameter> and (optionally)
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<parameter>length</parameter> parameters with the string given in
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<parameter>replace</parameter>.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>string</parameter></term>
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<listitem>
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<para>
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The input string.
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</para>
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<para>
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An <type>array</type> of <type>string</type>s can be provided, in which
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case the replacements will occur on each string in turn. In this case,
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the <parameter>replace</parameter>, <parameter>offset</parameter>
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and <parameter>length</parameter> parameters may be provided either as
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scalar values to be applied to each input string in turn, or as
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<type>array</type>s, in which case the corresponding array element will
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be used for each input string.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>replace</parameter></term>
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<listitem>
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<para>
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The replacement string.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>offset</parameter></term>
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<listitem>
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<para>
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If <parameter>offset</parameter> is non-negative, the replacing will
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begin at the <parameter>offset</parameter>'th offset into
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<parameter>string</parameter>.
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</para>
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<para>
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If <parameter>offset</parameter> is negative, the replacing will
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begin at the <parameter>offset</parameter>'th character from the
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end of <parameter>string</parameter>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>length</parameter></term>
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<listitem>
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<para>
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If given and is positive, it represents the length of the portion of
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<parameter>string</parameter> which is to be replaced. If it is
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negative, it represents the number of characters from the end of
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<parameter>string</parameter> at which to stop replacing. If it
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is not given, then it will default to strlen(
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<parameter>string</parameter> ); i.e. end the replacing at the
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end of <parameter>string</parameter>. Of course, if
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<parameter>length</parameter> is zero then this function will have the
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effect of inserting <parameter>replace</parameter> into
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<parameter>string</parameter> at the given
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<parameter>offset</parameter> offset.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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The result string is returned. If <parameter>string</parameter> is an
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array then array is returned.
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<para>
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>8.0.0</entry>
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<entry>
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<parameter>length</parameter> is nullable now.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title>Simple <function>substr_replace</function> examples</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$var = 'ABCDEFGH:/MNRPQR/';
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echo "Original: $var<hr />\n";
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/* These two examples replace all of $var with 'bob'. */
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echo substr_replace($var, 'bob', 0) . "<br />\n";
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echo substr_replace($var, 'bob', 0, strlen($var)) . "<br />\n";
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/* Insert 'bob' right at the beginning of $var. */
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echo substr_replace($var, 'bob', 0, 0) . "<br />\n";
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/* These next two replace 'MNRPQR' in $var with 'bob'. */
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echo substr_replace($var, 'bob', 10, -1) . "<br />\n";
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echo substr_replace($var, 'bob', -7, -1) . "<br />\n";
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/* Delete 'MNRPQR' from $var. */
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echo substr_replace($var, '', 10, -1) . "<br />\n";
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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<example>
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<title>
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Using <function>substr_replace</function> to replace multiple strings at
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once
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</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$input = array('A: XXX', 'B: XXX', 'C: XXX');
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// A simple case: replace XXX in each string with YYY.
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echo implode('; ', substr_replace($input, 'YYY', 3, 3))."\n";
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// A more complicated case where each replacement is different.
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$replace = array('AAA', 'BBB', 'CCC');
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echo implode('; ', substr_replace($input, $replace, 3, 3))."\n";
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// Replace a different number of characters each time.
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$length = array(1, 2, 3);
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echo implode('; ', substr_replace($input, $replace, 3, $length))."\n";
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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A: YYY; B: YYY; C: YYY
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A: AAA; B: BBB; C: CCC
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A: AAAXX; B: BBBX; C: CCC
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]]>
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</screen>
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</example>
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</para>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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¬e.bin-safe;
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>str_replace</function></member>
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<member><function>substr</function></member>
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<member><link linkend="language.types.string.substr">String access and modification by character</link></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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