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PHP mysql_field_len() Function

PHP MySQL Reference Complete PHP MySQL Reference

Definition and Usage

The mysql_field_len() function returns the maximum length of a field in a recordset.

Returns the length of the field on success, or FALSE on failure.

Syntax

mysql_field_len(data,field_offset)

Parameter Description
data Required. Specifies which data pointer to use. The data pointer is the result from the mysql_query() function
field_offset Required. Specifies which field to start returning. 0 indicates the first field

Example

<?php
$con = mysql_connect("localhost", "peter", "abc123");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

$db_selected = mysql_select_db("test_db",$con);

$sql = "SELECT * from Person";
$result = mysql_query($sql,$con);

$length = mysql_field_len($result, 0);

echo $length;

mysql_close($con);
?>

The output of the code above could be:

20

PHP MySQL Reference Complete PHP MySQL Reference
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