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PHP mysql_field_flags() Function

PHP MySQL Reference Complete PHP MySQL Reference

Definition and Usage

The mysql_field_flags() function returns the flags of a field in a recordset.

This function gets field data from the mysql_query() function and returns a string on success, or FALSE on failure or when there are no more rows.

Possible return values:

  • auto_intcrement - 1 if AUTO_INCREMENT is set
  • binary - 1 if the field has the BINAR attribute set
  • blob - 1 if the field is a BLOB
  • enum - 1 if the field is an ENUM field
  • multiple_key - 1 if the field is a non-unique key
  • not_null - 1 if the field cannot be NULL
  • primary_key - 1 if the field is a primary key
  • timestamp - 1 if the field is a timestamp field
  • unique_key - 1 if the field is a unique key
  • unsigned - 1 if the field is unsigned
  • zerofill - 1 if the field is zero-filled

Syntax

mysql_field_flags(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

Tips and Notes

Tip: You can break the returned string into an array by using explode().

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);

$flags = mysql_field_flags($result, 0);
echo $flags;

mysql_close($con);
?>

The output of the code above could be:

not_null primary_key auto_increment

PHP MySQL Reference Complete PHP MySQL Reference
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