php-doc-en/reference/maxdb/functions/maxdb-fetch-lengths.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
  <refentry id="function.maxdb-fetch-lengths">
   <refnamediv>
    <refname>maxdb_fetch_lengths</refname>
    <refname>result->lengths</refname>
    <refpurpose>Returns the lengths of the columns of the current row in the result set</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <para>Procedural style:</para>
    <methodsynopsis>
     <type>array</type><methodname>maxdb_fetch_lengths</methodname>
     <methodparam><type>resource</type><parameter>result</parameter></methodparam>
    </methodsynopsis>
    <para>Object oriented style (property):</para>
    <classsynopsis>
     <ooclass><classname>result</classname></ooclass>
     <fieldsynopsis><type>array</type><varname>lengths</varname></fieldsynopsis>
    </classsynopsis>
    <para>
     The <function>maxdb_fetch_lengths</function> function returns an array containing the
     lengths of every column of the current row within the result set represented by the
     <parameter>result</parameter> parameter. If successful, a numerically indexed array
     representing the lengths of each column is returned or &false; on failure.
    </para>
   </refsect1>
   <refsect1>
    <title>Return values</title>
    <para>
     An array of integers representing the size of each column (not including
     any terminating null characters). &false; if an error occurred. 
    </para>
    <para>
     <function>maxdb_fetch_lengths</function> is valid only for the current row of the result set. 
     It returns &false; if you call it before calling maxdb_fetch_row/array/resource or after retrieving 
     all rows in the result. 
    </para>
   </refsect1>
   <refsect1>
    <title>Example</title>
    <example>
     <title>Object oriented style</title>
     <programlisting role="php">
<![CDATA[
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

/* check connection */
if (maxdb_connect_errno()) {
   printf("Connect failed: %s\n", maxdb_connect_error());
   exit();
}

$query = "SELECT * from hotel.customer WHERE cno = 3000";

if ($result = $maxdb->query($query)) {

   $row = $result->fetch_row();

   /* display column lengths */
   foreach ($result->lengths as $i => $val) {
       printf("Field %2d has Length %2d\n", $i+1, $val);
   }
   $result->close();
}

/* close connection */
$maxdb->close();
?>
]]>
    </programlisting>
    </example>
    <example>
     <title>Procedural style</title>
     <programlisting role="php">
<![CDATA[
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

/* check connection */
if (maxdb_connect_errno()) {
   printf("Connect failed: %s\n", maxdb_connect_error());
   exit();
}

$query = "SELECT * from hotel.customer WHERE cno = 3000";

if ($result = maxdb_query($link, $query)) {

   $row = maxdb_fetch_row($result);

   /* display column lengths */
   foreach (maxdb_fetch_lengths($result) as $i => $val) {
       printf("Field %2d has Length %2d\n", $i+1, $val);
   }
   maxdb_free_result($result);
}

/* close connection */
maxdb_close($link);
?>
]]>
     </programlisting>
    </example>
    <para>
     The above examples would produce the following output:
    </para>
    <screen>
<![CDATA[
Field  1 has Length  4
Field  2 has Length  3
Field  3 has Length  5
Field  4 has Length  6
Field  5 has Length  5
Field  6 has Length 21
]]>
    </screen>
   </refsect1>
  </refentry>

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