assert

bool assert ( mixed $assertion [, string $description ] )

Checks if assertion is FALSE

assert() will check the given assertion and take appropriate action if its result is FALSE.


<?php
// Active assert and make it quiet
assert_options(ASSERT_ACTIVE, 1);
assert_options(ASSERT_WARNING, 0);
assert_options(ASSERT_QUIET_EVAL, 1);

// Create a handler function
function my_assert_handler($file, $line, $code)
{
    echo "<hr>Assertion Failed:
        File '$file'<br />
        Line '$line'<br />
        Code '$code'<br /><hr />";
}

// Set up the callback
assert_options(ASSERT_CALLBACK, 'my_assert_handler');

// Make an assertion that should fail
assert('mysql_query("")');
?>



5.4.8 The description parameter was added. The description is also now provided to a callback function in ASSERT_CALLBACK mode as the fourth argument.

Future will be better than thy past (ElectroFest Summer'12, UITS, Dhaka)