Previously, lambda-style functions were only possible by using create_function. This has one major disadvantage, the function is compiled at run time, opcode caches can’t cache the function at compile time.

<?php
 
$func = create_function(’$a,$b’, ‘return "ln($a) + ln($b) = " . log($a * $b);’);
echo "New anonymous function: $func\n";
echo $newfunc(2, M_E) . "\n";
// New anonymous function: lambda_1
// [...]

Posted in PHP 5.3
Tags: Closure, Lambda, __invoke
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