Copyright 1997-2021 the PHP Documentation Group.
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 and related FAQ for more information. Alternatives to this function include:
mysqli_fetch_field_direct [length] |
PDOStatement::getColumnMeta [len] |
Description
int|false mysql_field_len(resource result,
int field_offset);
mysql_field_len
returns the length of the specified field.
Parameters
-
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 at0
. Iffield_offset
does not exist, an error of levelE_WARNING
is also issued.
Return Values
The length of the specified field index on success or
false
on failure.
Examples
Example 6.28 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;
?>
Notes
For backward compatibility, the following deprecated alias may
be used: mysql_fieldlen
See Also
mysql_fetch_lengths
|
strlen
|