smarty/docs/en/designers/language-custom-functions/language-function-cycle.xml

<?xml version="1.0" encoding="iso-8859-1"?>
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<sect1 id="language.function.cycle">
 <title>{cycle}</title>
  <para>
   {cycle} is used to cycle though a set of values. This makes it easy
   to alternate for example between two or more colors in a table, or cycle
   through an array of values.
 </para>
 
 <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>Attribute Name</entry>
     <entry>Type</entry>
     <entry>Required</entry>
     <entry>Default</entry>
     <entry>Description</entry>
    </row>
   </thead>
   <tbody>
    <row>
     <entry>name</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>default</emphasis></entry>
     <entry>The name of the cycle</entry>
    </row>
    <row>
     <entry>values</entry>
     <entry>mixed</entry>
     <entry>Yes</entry>
     <entry><emphasis>N/A</emphasis></entry>
     <entry>The values to cycle through, either a comma
      delimited list (see delimiter attribute), or an array
      of values.</entry>
    </row>
    <row>
     <entry>print</entry>
     <entry>boolean</entry>
     <entry>No</entry>
     <entry><emphasis>true</emphasis></entry>
     <entry>Whether to print the value or not</entry>
    </row>
    <row>
     <entry>advance</entry>
     <entry>boolean</entry>
     <entry>No</entry>
     <entry><emphasis>true</emphasis></entry>
     <entry>Whether or not to advance to the next value</entry>
    </row>
    <row>
     <entry>delimiter</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>,</emphasis></entry>
     <entry>The delimiter to use in the values attribute.</entry>
    </row>
    <row>
     <entry>assign</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>the template variable the output will be assigned
      to</entry>
    </row>
    <row>
     <entry>reset</entry>
     <entry>boolean</entry>
     <entry>No</entry>
     <entry><emphasis>false</emphasis></entry>
     <entry>The cycle will be set to the first value and not advanced</entry>
    </row>
   </tbody>
  </tgroup>
 </informaltable>

 <para>
  You can {cycle} through more than one set of values in your template
  by supplying a name attribute. Give each set of values a unique
  name.
 </para>
 <para>
  You can force the current value not to print with the print
  attribute set to false. This would be useful for silently skipping
  a value.
 </para>
 <para>
  The advance attribute is used to repeat a value. When set to false,
  the next call to {cycle} will print the same value.
 </para>
 <para>
  If you supply the special "assign" attribute, the output of the
  cycle function will be assigned to a template variable instead of
  being output to the template.
 </para>
 <example>
  <title>{cycle}</title>
  <programlisting>
<![CDATA[
{section name=rows loop=$data}
<tr bgcolor="{cycle values="#eeeeee,#d0d0d0"}">
   <td>{$data[rows]}</td>
</tr>
{/section}
]]>
  </programlisting>
  <screen>
<![CDATA[
<tr bgcolor="#eeeeee">
   <td>1</td>
</tr>
<tr bgcolor="#d0d0d0">
   <td>2</td>
</tr>
<tr bgcolor="#eeeeee">
   <td>3</td>
</tr>
]]>
  </screen>
 </example>

</sect1>
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