<?php
function foobar($arg, $arg2) {echo __FUNCTION__, " got $arg and $arg2\n";
}
class foo {function bar($arg, $arg2) {echo __METHOD__, " got $arg and $arg2\n";}
}// Call the foobar() function with 2 arguments
call_user_func_array("foobar", array("one", "two"));// Call the $foo->bar() method with 2 arguments
$foo = new foo;
call_user_func_array(array($foo, "bar"), array("three", "four"));
?>

foobar got one and two
foo::bar got three and four

<?phpnamespace Foobar;class Foo {static public function test($name) {print "Hello {$name}!\n";}
}// As of PHP 5.3.0
call_user_func_array(__NAMESPACE__ .'\Foo::test', array('Hannes'));// As of PHP 5.3.0
call_user_func_array(array(__NAMESPACE__ .'\Foo', 'test'), array('Philip'));?>

Hello Hannes!
Hello Philip!

<?php$func = function($arg1, $arg2) {return $arg1 * $arg2;
};var_dump(call_user_func_array($func, array(2, 4))); /* As of PHP 5.3.0 */?>

int(8)

<?phpfunction mega(&$a){$a = 55;echo "function mega \$a=$a\n";
}
$bar = 77;
call_user_func_array('mega',array(&$bar));
echo "global \$bar=$bar\n";?>

function mega $a=55
global $bar=55

<?php
error_reporting(E_ALL);
function increment(&$var)
{$var++;
}$a = 0;
call_user_func('increment', $a);
echo $a."\n";call_user_func_array('increment', array(&$a)); // You can use this instead before PHP 5.3
echo $a."\n";
?>

0
1

<?php
function barber($type)
{echo "You wanted a $type haircut, no problem\n";
}
call_user_func('barber', "mushroom");
call_user_func('barber', "shave");
?>

You wanted a mushroom haircut, no problem
You wanted a shave haircut, no problem

<?phpnamespace Foobar;class Foo {static public function test() {print "Hello world!\n";}
}call_user_func(__NAMESPACE__ .'\Foo::test'); // As of PHP 5.3.0
call_user_func(array(__NAMESPACE__ .'\Foo', 'test')); // As of PHP 5.3.0?>

Hello world!
Hello world!

<?phpclass myclass {static function say_hello(){echo "Hello!\n";}
}$classname = "myclass";call_user_func(array($classname, 'say_hello'));
call_user_func($classname .'::say_hello'); // As of 5.2.3$myobject = new myclass();call_user_func(array($myobject, 'say_hello'));?>

Hello!
Hello!
Hello!

<?php
call_user_func(function($arg) { print "[$arg]\n"; }, 'test'); /* As of PHP 5.3.0 */
?>

[test]

<?php
$newfunc = create_function('$a,$b', 'return "ln($a) + ln($b) = " . log($a * $b);');
echo "New anonymous function: $newfunc\n";
echo $newfunc(2, M_E) . "\n";
// outputs
// New anonymous function: lambda_1
// ln(2) + ln(2.718281828459) = 1.6931471805599
?>

<?php
function process($var1, $var2, $farr)
{foreach ($farr as $f) {echo $f($var1, $var2) . "\n";}
}// create a bunch of math functions
$f1 = 'if ($a >=0) {return "b*a^2 = ".$b*sqrt($a);} else {return false;}';
$f2 = "return \"min(b^2+a, a^2,b) = \".min(\$a*\$a+\$b,\$b*\$b+\$a);";
$f3 = 'if ($a > 0 && $b != 0) {return "ln(a)/b = ".log($a)/$b; } else { return false; }';
$farr = array(create_function('$x,$y', 'return "some trig: ".(sin($x) + $x*cos($y));'),create_function('$x,$y', 'return "a hypotenuse: ".sqrt($x*$x + $y*$y);'),create_function('$a,$b', $f1),create_function('$a,$b', $f2),create_function('$a,$b', $f3));echo "\nUsing the first array of anonymous functions\n";
echo "parameters: 2.3445, M_PI\n";
process(2.3445, M_PI, $farr);// now make a bunch of string processing functions
$garr = array(create_function('$b,$a', 'if (strncmp($a, $b, 3) == 0) return "** \"$a\" '.'and \"$b\"\n** Look the same to me! (looking at the first 3 chars)";'),create_function('$a,$b', '; return "CRCs: " . crc32($a) . ", ".crc32($b);'),create_function('$a,$b', '; return "similar(a,b) = " . similar_text($a, $b, &$p) . "($p%)";'));
echo "\nUsing the second array of anonymous functions\n";
process("Twas brilling and the slithy toves", "Twas the night", $garr);
?>

Using the first array of anonymous functions
parameters: 2.3445, M_PI
some trig: -1.6291725057799
a hypotenuse: 3.9199852871011
b*a^2 = 4.8103313314525
min(b^2+a, a^2,b) = 8.6382729035898
ln(a)/b = 0.27122299212594Using the second array of anonymous functions
** "Twas the night" and "Twas brilling and the slithy toves"
** Look the same to me! (looking at the first 3 chars)
CRCs: -725381282, 342550513
similar(a,b) = 11(45.833333333333%)

<?php
$av = array("the ", "a ", "that ", "this ");
array_walk($av, create_function('&$v,$k', '$v = $v . "mango";'));
print_r($av);
?>

Array
([0] => the mango[1] => a mango[2] => that mango[3] => this mango
)

<?php$sv = array("small", "larger", "a big string", "it is a string thing");
print_r($sv);?>

Array
([0] => small[1] => larger[2] => a big string[3] => it is a string thing
)

<?phpusort($sv, create_function('$a,$b','return strlen($b) - strlen($a);'));
print_r($sv);?>

Array
([0] => it is a string thing[1] => a big string[2] => larger[3] => small
)