


How to Achieve Immediate Execution of Anonymous Functions in PHP?
Oct 25, 2024 am 02:27 AMAchieving Immediate Execution of Anonymous Functions in PHP
In JavaScript, anonymous functions provide a convenient way to execute code immediately upon definition. This pattern is defined as follows:
<code class="javascript">(function () { /* do something */ })()</code>
However, in PHP, this syntax doesn't work directly. To emulate this behavior, we have two primary options:
PHP Versions Prior to 7:
For PHP versions before 7, leveraging call_user_func() is a viable solution:
<code class="php">call_user_func(function() { echo 'executed'; });</code>
This approach wraps the anonymous function within call_user_func() to execute it immediately.
PHP Versions 7 and Higher:
Modern versions of PHP introduce arrow functions, which provide a more concise way to execute anonymous functions instantly:
<code class="php">(function() { echo 'executed'; })();</code>
This syntax allows for immediate execution without the need for call_user_func().
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