smarty/docs/en/designers/language-modifiers/language-modifier-regex-replace.xml

<?xml version="1.0" encoding="iso-8859-1"?>
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 <sect1 id="language.modifier.regex.replace">
  <title>regex_replace</title>
  <informaltable frame="all">
   <tgroup cols="5">
    <colspec colname="param" align="center" />
    <colspec colname="type" align="center" />
    <colspec colname="required" align="center" />
    <colspec colname="default" align="center" />
    <colspec colname="desc"/>
    <thead>
     <row>
      <entry>Parameter Position</entry>
      <entry>Type</entry>
      <entry>Required</entry>
      <entry>Default</entry>
      <entry>Description</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>1</entry>
      <entry>string</entry>
      <entry>Yes</entry>
      <entry><emphasis>n/a</emphasis></entry>
      <entry>This is the regular expression to be replaced.</entry>
     </row>
     <row>
      <entry>2</entry>
      <entry>string</entry>
      <entry>Yes</entry>
      <entry><emphasis>n/a</emphasis></entry>
      <entry>This is the string of text to replace with.</entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
  <para>
   A regular expression search and replace on a variable. Use the
   syntax for <ulink
   url="&url.php-manual;preg_replace">preg_replace()</ulink> from the PHP manual.
  </para>
  <example>
   <title>regex_replace</title>
   <programlisting role="php">
<![CDATA[
<?php

$smarty->assign('articleTitle', "Infertility unlikely to\nbe passed on, experts say.");

?>
]]>
   </programlisting>
   <para>
    Where index.tpl is:
   </para>
   <programlisting>
<![CDATA[
{* replace each carriage return, tab and new line with a space *}

{$articleTitle}
{$articleTitle|regex_replace:"/[\r\t\n]/":" "}
]]>
   </programlisting>
   <para>
    This should output:
   </para>
   <screen>
<![CDATA[
Infertility unlikely to
be passed on, experts say.
Infertility unlikely to be passed on, experts say.
]]>
   </screen>
  </example>
  <para>
   See also <link linkend="language.modifier.replace">replace</link>
   and <link linkend="language.modifier.escape">escape</link>.
  </para>
 </sect1>

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