MySQL and PHP
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] |
int|false mysql_field_len(resource result,
int field_offset);
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 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; ?>
For backward compatibility, the following deprecated alias may
be used: mysql_fieldlen
mysql_fetch_lengths
|
strlen
|