array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'en', ), 'this' => array ( 0 => 'function.mysql-field-len.php', 1 => 'mysql_field_len', ), 'up' => array ( 0 => 'ref.mysql.php', 1 => 'MySQL Functions', ), 'prev' => array ( 0 => 'function.mysql-field-flags.php', 1 => 'mysql_field_flags', ), 'next' => array ( 0 => 'function.mysql-field-name.php', 1 => 'mysql_field_name', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/mysql/functions/mysql-field-len.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 4, PHP 5)
mysql_field_len — Returns the length of the specified field
This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide. Alternatives to this function include:
mysql_field_len() returns the length of the specified field.
result
The result resource that is being evaluated. This result comes from a call to mysql_query().
field_offset
The numerical field offset. The
field_offset
starts at 0
. If
field_offset
does not exist, an error of level
E_WARNING
is also issued.
The length of the specified field index on success or false
on failure.
Example #1 mysql_field_len() example
<?php
$result = mysql_query("SELECT id,email FROM people WHERE id = '42'");
if (!$result) {
echo 'Could not run query: ' . mysql_error();
exit;
}
// Will get the length of the id field as specified in the database
// schema.
$length = mysql_field_len($result, 0);
echo $length;
?>
Note:
For backward compatibility, the following deprecated alias may be used: mysql_fieldlen()