# mysql_field_len

(PHP 4, PHP 5)

mysql_field_len — Returns the length of the specified field

Warning

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

mysql_field_len ( resource `$result` , int `$field_offset` ) : int|false

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 at `0`. If `field_offset` does not exist, an error of level `E_WARNING` is also issued.

### Return Values

The length of the specified field index on success or `FALSE` on failure.

### Examples

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;
?>`

### Notes

> Note:

> For backward compatibility, the following deprecated alias may be used: mysql_fieldlen()

### See Also

- mysql_fetch_lengths() - Get the length of each output in a result
- strlen() - Get string length