Using associative arrays with an if statement

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LEARN ABOUT PHP

pdo.exec

PDO.EXEC(3)								 1							       PDO.EXEC(3)

PDO
::exec - Execute an SQL statement and return the number of affected rows

SYNOPSIS

       public int PDO::exec (string  $statement)

DESCRIPTION

       PDO.exec(3) executes an SQL statement in a single function call, returning the number of rows affected by the statement.

       PDO.exec(3)  does  not return results from a SELECT statement. For a SELECT statement that you only need to issue once during your program,
       consider issuing PDO.query(3). For a statement that you need to issue multiple times, prepare a PDOStatement object with PDO.prepare(3) and
       issue the statement with PDOStatement.execute(3).

PARAMETERS

	      o $statement
		- The SQL statement to prepare and execute.  Data inside the query should be properly escaped.

RETURN VALUES

       PDO.exec(3) returns the number of rows that were modified or deleted by the SQL statement you issued. If no rows were affected, PDO.exec(3)
       returns 0.

       Warning

	      This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on
	      Booleans for more information. Use the === operator for testing the return value of this function.

	The following example incorrectly relies on the return value of PDO.exec(3), wherein a statement that affected 0 rows results in a call to
       die(3):

       <?php
       $db->exec() or die(print_r($db->errorInfo(), true));
       ?>

EXAMPLES

       Example #1

	      Issuing a DELETE statement

	       Count the number of rows deleted by a DELETE statement with no WHERE clause.

	      <?php
	      $dbh = new PDO('odbc:sample', 'db2inst1', 'ibmdb2');

	      /* Delete all rows from the FRUIT table */
	      $count = $dbh->exec("DELETE FROM fruit WHERE colour = 'red'");

	      /* Return number of rows that were deleted */
	      print("Deleted $count rows.
");
	      ?>

	      The above example will output:

	      Deleted 1 rows.

SEE ALSO

       PDO.prepare(3), PDO.query(3), PDOStatement.execute(3).

PHP Documentation Group 													       PDO.EXEC(3)

UNIX for Dummies Questions & Answers