assert_options

Set/get the various assert flags (PHP 4, PHP 5)
mixed assert_options ( int what [, mixed value] )

Set the various assert() control options or just query their current settings.

Parameters

what

Table 260. Assert Options

option	ini-parameter	default	description
ASSERT_ACTIVE	assert.active	1	enable assert() evaluation
ASSERT_WARNING	assert.warning	1	issue a PHP warning for each failed assertion
ASSERT_BAIL	assert.bail	0	terminate execution on failed assertions
ASSERT_QUIET_EVAL	assert.quiet_eval	0	disable error_reporting during assertion expression evaluation
ASSERT_CALLBACK	assert.callback	(`NULL`)	user function to call on failed assertions

value

An optional new value for the option.

Return Values

Returns the original setting of any option or FALSE on errors.

Code Examples / Notes » assert_options

frÃ©dÃ©ric bouchery

Here is an exemple how to use the assertion callback function : <?php assert_options( ASSERT_CALLBACK, 'assert_callback'); function assert_callback( $script, $line, $message ) { echo 'You have a design error in your script ', $script,' : line ', $line,' : '; echo '', ereg_replace( '^.*//\*', '', $message ), ' '; echo 'Open the source file and check it, because it\'s not a normal behaviour !'; exit; } $x = 3; assert('is_integer( $x ) && ($x >= 0) && ($x <= 10); //* $x must be an integer value from 0 to 10' ); echo "0 <= $x <= 10"; ?> assertion is usefull for "design by contract" methodology ...

webmaster

For all of you try to throw an exception in assert callback function you must set options in following form: <?php error_reporting(E_ALL | E_STRICT); function assert_callcack($file, $line, $message) { throw new Exception(); } assert_options(ASSERT_ACTIVE, 1); assert_options(ASSERT_WARNING, 0); assert_options(ASSERT_BAIL, 0); assert_options(ASSERT_QUIET_EVAL, 0); assert_options(ASSERT_CALLBACK, 'assert_callcack'); try { assert(false); } catch (Exception $e) { echo 'Yes'; } ?>

gherson

After being set to 1, my assert_options(ASSERT_BAIL) value stubbornly stayed there until Apache was restarted, returning it to its default of 0. (Reproducible on my PHP Version 5.1.2, Apache/2.2.0 (Win32))

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