How to Find Function Definitions in PHP Code?

Finding Function Definitions in PHP

When dealing with complex PHP codebases, it can be challenging to determine where functions are defined. Here's a technique to effortlessly find the file and line number of a function's definition:

Using the ReflectionFunction Class:

PHP provides the ReflectionFunction class, which offers a way to introspect functions. With this class, you can retrieve metadata about a function, including its definition location:

$reflFunc = new ReflectionFunction('function_name');
$filename = $reflFunc->getFileName();
$line = $reflFunc->getStartLine();

echo "Function 'function_name' is defined in $filename:$line";

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