php-doc-en/language/control-structures/continue.xml

<?xml version="1.0" encoding="utf-8"?>
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<sect1 xml:id="control-structures.continue" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <title><literal>continue</literal></title>
 <simpara>
  <literal>continue</literal> is used within looping structures to
  skip the rest of the current loop iteration and continue execution
  at the condition evaluation and then the beginning of the next iteration.
 </simpara>
 <note>
  <simpara>
   Note that in PHP the
   <link linkend="control-structures.switch">switch</link> statement is
   considered a looping structure for the purposes of
   <literal>continue</literal>.
  </simpara>
 </note>
 <simpara>
  <literal>continue</literal> accepts an optional numeric argument
  which tells it how many levels of enclosing loops it should skip
  to the end of.
 </simpara>
 <para>
  <informalexample>
   <programlisting role="php">
<![CDATA[
<?php
while (list($key, $value) = each($arr)) {
    if (!($key % 2)) { // skip odd members
        continue;
    }
    do_something_odd($value);
}

$i = 0;
while ($i++ < 5) {
    echo "Outer<br />\n";
    while (1) {
        echo "&nbsp;&nbsp;Middle<br />\n";
        while (1) {
            echo "&nbsp;&nbsp;Inner<br />\n";
            continue 3;
        }
        echo "This never gets output.<br />\n";
    }
    echo "Neither does this.<br />\n";
}
?>
]]>
   </programlisting>
   </informalexample>
  </para>
  <para>
   Omitting the semicolon after <literal>continue</literal> can lead to
   confusion. Here's an example of what you shouldn't do.
  </para>
  <para>
   <informalexample>
    <programlisting role="php">
<![CDATA[
<?php
for ($i = 0; $i < 5; ++$i) {
    if ($i == 2)
        continue
    print "$i\n";
}
?>
]]>
    </programlisting>
    <para>
     One can expect the result to be :
    </para>
    <screen>
<![CDATA[
0
1
3
4
]]>
    </screen>
    <para>
     but this script will output :
    </para>
    <screen>
<![CDATA[
2
]]>
    </screen>
    <para>
     because the return value of the <function>print</function>
     call is <literal>int(1)</literal>, and it will look like the
     optional numeric argument mentioned above.
    </para>
   </informalexample>
  </para>
</sect1>

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