mysql_fetch_field(3) [php man page]

MYSQL_FETCH_FIELD(3)							 1						      MYSQL_FETCH_FIELD(3)

mysql_fetch_field - Get column information from a result and return as an object

SYNOPSIS

       Warning

	      This  extension  is deprecated as of PHP 5.5.0, and will be removed in the future. 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:

		     omysqli_fetch_field(3)

		     o PDOStatement::getColumnMeta

       object mysql_fetch_field (resource  $result, [int  $field_offset])

DESCRIPTION

	Returns an object containing field information. This function can be used to obtain information about fields in the provided query result.

	      o $
		result -The result resource that is being evaluated. This result comes from a call to mysql_query(3).

	      o $field_offset
		- The numerical field offset. If the field offset is not specified, the next field that was not yet retrieved by this function	is
		retrieved. The $field_offset starts at 0.

	Returns an object containing field information. The properties of the object are:

	      o name - column name

	      o table - name of the table the column belongs to, which is the alias name if one is defined

	      o max_length - maximum length of the column

	      o not_null - 1 if the column cannot be
		NULL

	      o primary_key - 1 if the column is a primary key

	      o unique_key - 1 if the column is a unique key

	      o multiple_key - 1 if the column is a non-unique key

	      o numeric - 1 if the column is numeric

	      o blob - 1 if the column is a BLOB

	      o type - the type of the column

	      o unsigned - 1 if the column is unsigned

	      o zerofill - 1 if the column is zero-filled

       Example #1

	      mysql_fetch_field(3) example

	      <?php
	      $conn = mysql_connect('localhost', 'mysql_user', 'mysql_password');
	      if (!$conn) {
		  die('Could not connect: ' . mysql_error());
	      }
	      mysql_select_db('database');
	      $result = mysql_query('select * from table');
	      if (!$result) {
		  die('Query failed: ' . mysql_error());
	      }
	      /* get column metadata */
	      $i = 0;
	      while ($i < mysql_num_fields($result)) {
		  echo "Information for column $i:<br />
";
		  $meta = mysql_fetch_field($result, $i);
		  if (!$meta) {
		      echo "No information available<br />
";
		  }
		  echo "<pre>
	      blob:	    $meta->blob
	      max_length:   $meta->max_length
	      multiple_key: $meta->multiple_key
	      name:	    $meta->name
	      not_null:     $meta->not_null
	      numeric:	    $meta->numeric
	      primary_key:  $meta->primary_key
	      table:	    $meta->table
	      type:	    $meta->type
	      unique_key:   $meta->unique_key
	      unsigned:     $meta->unsigned
	      zerofill:     $meta->zerofill
	      </pre>";
		  $i++;
	      }
	      mysql_free_result($result);
	      ?>

       Note

	      Field names returned by this function are case-sensitive.

       Note

	       If  field  or  tablenames  are  aliased	in the SQL query the aliased name will be returned. The original name can be retrieved for
	      instance by using mysqli_result::fetch_field.

       mysql_field_seek(3).

PHP Documentation Group 												      MYSQL_FETCH_FIELD(3)

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MYSQL_RESULT(3) 							 1							   MYSQL_RESULT(3)

mysql_result - Get result data

SYNOPSIS

       Warning

	      This  extension  is deprecated as of PHP 5.5.0, and will be removed in the future. 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:

		     omysqli_data_seek(3) in conjunction with mysqli_field_seek(3) and mysqli_fetch_field(3)

		     o PDOStatement::fetchColumn

       string mysql_result (resource  $result, int  $row, [mixed  $field])

DESCRIPTION

	Retrieves the contents of one cell from a MySQL result set.

	When working on large result sets, you should consider using one of the functions that fetch an entire row  (specified	below).  As  these
       functions return the contents of multiple cells in one function call, they're MUCH quicker than mysql_result(3). Also, note that specifying
       a numeric offset for the field argument is much quicker than specifying a fieldname or tablename.fieldname argument.

	      o $
		result -The result resource that is being evaluated. This result comes from a call to mysql_query(3).

	      o $row
		- The row number from the result that's being retrieved. Row numbers start at 0.

	      o $field
		- The name or offset of the field being retrieved.  It can be the field's offset, the field's name, or the field's table dot field
		name (tablename.fieldname). If the column name has been aliased ('select foo as bar from...'), use the alias instead of the column
		name. If undefined, the first field is retrieved.

	The contents of one cell from a MySQL result set on success, or FALSE on failure.

       Example #1

	      mysql_result(3) example

	      <?php
	      $link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
	      if (!$link) {
		  die('Could not connect: ' . mysql_error());
	      }
	      if (!mysql_select_db('database_name')) {
		  die('Could not select database: ' . mysql_error());
	      }
	      $result = mysql_query('SELECT name FROM work.employee');
	      if (!$result) {
		  die('Could not query:' . mysql_error());
	      }
	      echo mysql_result($result, 2); // outputs third employee's name

	      mysql_close($link);
	      ?>

       Note

	       Calls to mysql_result(3) should not be mixed with calls to other functions that deal with the result set.

       mysql_fetch_row(3), mysql_fetch_array(3), mysql_fetch_assoc(3), mysql_fetch_object(3).

PHP Documentation Group 													   MYSQL_RESULT(3)

Linux and UNIX Man Pages

mysql_fetch_field(3) [php man page]

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