Function list of php file

Question

How to get list of functions that are declared in a php file

Answer 1

If you're not worried about catching some commented out ones, this might be the simplest way:

preg_match_all('/function (\w+)/', file_get_contents(__FILE__), $m);
var_dump($m[1]);

Answer 2

To retrieve also the params definition: (Source in comments)

Array

(
    [0] => function foo ( &&bar, &big, [$small = 1] )

    [1] => function bar ( &foo )

    [2] => function noparams (  )

    [3] => function byrefandopt ( [&$the = one] )

)

---

$functions = get_defined_functions();
$functions_list = array();
foreach ($functions['user'] as $func) {
        $f = new ReflectionFunction($func);
        $args = array();
        foreach ($f->getParameters() as $param) {
                $tmparg = '';
                if ($param->isPassedByReference()) $tmparg = '&';
                if ($param->isOptional()) {
                        $tmparg = '[' . $tmparg . '$' . $param->getName() . ' = ' . $param->getDefaultValue() . ']';
                } else {
                        $tmparg.= '&' . $param->getName();
                }
                $args[] = $tmparg;
                unset ($tmparg);
        }
        $functions_list[] = 'function ' . $func . ' ( ' . implode(', ', $args) . ' )' . PHP_EOL;
}
print_r($functions_list);

Answer 3

I solved this problem with array_diff

$funcs = get_defined_functions()["user"];

require_once 'myFileWithNewFunctions.php'; // define function testFunc() {} here

var_dump( array_values( array_diff(get_defined_functions()["user"], $funcs) ) )
// output: array[ 0 => "test_func"]

Update

To get the "real" functions name try this

foreach($funcsDiff AS $newFunc) {
   $func = new \ReflectionFunction($newFunc);
   echo $func->getName(); // testFunc
}

Answer 4

Well for what ever reason if you need to do this I show you:

Example file: Functions.php (I just wrote some random shit does not Mather it works with everything)

<?php

    // gewoon een ander php script. door het gebruiken van meerdere includes kun je gemakkelijk samen aan één app werken

    function johannes($fnaam, $mode, $array){

        switch ($mode) {
            case 0:
                echo "
                        <center>
                        <br><br><br><br><br>
                            he johannes!<br><br>

                            klik hier voor random text:<br>
                            <input type='submit' value='superknop' id='btn' action='randomding' level='0' loadloc='randomshit' />
                            <p id='randomshit'></p>
                        </center>
                     ";
                break;
            case 1:
                echo "bouw formulier";
                break;
            case 2:
                echo "verwerk formulier";
                break;
             default:
                echo "[Error: geen mode gedefinieerd voor functie '$fnaam'!]";
        }
    }

    function randomding($fnaam, $mode, $array){

        $randomar = array('He pipo wat mot je!','bhebhehehehe bheeeee. rara wie ben ik?','poep meloen!','He johannes, wat doeeeeee je? <input type="text" name="doen" class="deze" placeholder="Wat doe je?" /> <input type="button" value="vertellen!" id="btn" action="watdoetjho" level="0" loadloc="hierzo" kinderen="deze"> <p id="hierzo"></p>','knopje de popje opje mopje','abcdefghijklmnopqrstuvwxyz, doe ook nog mee','Appien is een **p!!!!!! hahhahah<br><br><br><br> hahaha','Ik weet eiegelijk niks meer te verzinnen','echt ik weet nu niks meer','nou oke dan[[][(!*($@#&*$*^éäåðßð','he kijk een microboat: <br> <img src="https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcS_n8FH6xzf24kEc31liZF6ULHCn2IINFurlFZ_G0f0_F4sLTi74w" alt="microboat" />');

        $tellen = count($randomar);
        $tellen--;

        $rand = rand(0, $tellen);

        echo $randomar[$rand];
    }

    function watdoetjho($fnaam, $mode, $array){

        $dit = $array['doen'];
        echo "Johannes is: $dit";

    }

?>

We have 3 functions inside here:

1. johannes
2. randomding
3. watdoetjho

But we also call these functions:

1. count
2. rand

If we use get_defined_functions we will get all functions inside scope of script. Yes the PHP functions are separated from the user declared ones but still we want from a specific file.

If we use token_get_all we will receive a large amount of data we need to separate first.

I found these number which we need to make some connections inside the array to match the user functions. Otherwise we will have a list including all of php functions which are called upon.

The numbers are:

• 334 (List of all the user declared functions)
• 307 (List of all the function names)

If we filter the array to take all the 334 elements we have this:

334 -|- function -|- 5

But we need the function name and all the array elements are in relation with the 3rd value. So now we need to filter all the array elements which match the 3rd value (5) and the constant number 307.

This will give us something like this:

307 -|- johannes -|- 5

Now in PHP it will look like this:

<?php
    error_reporting(E_ALL ^ E_NOTICE); // Or we get these undefined index errors otherwise use other method to search array

    // Get the file and get all PHP language tokens out of it
    $arr = token_get_all(file_get_contents('Functions.php'));

    //var_dump($arr); // Take a look if you want

    //The array where we will store our functions
    $functions = array();

    // loop trough
    foreach($arr as $key => $value){

            //filter all user declared functions
        if($value[0] == 334){
                   //Take a look for debug sake
            //echo $value[0] .' -|- '. $value[1] . ' -|- ' . $value[2] . '<br>';

                    //store third value to get relation
                    $chekid = $value[2];
        }

            //now list functions user declared (note: The last check is to ensure we only get the first peace of information about the function which is the function name, else we also list other function header information like preset values)
        if($value[2] == $chekid && $value[0] == 307 && $value[2] != $old){

                    // just to see what happens
                    echo $value[0] .' -|- '. $value[1] . ' -|- ' . $value[2] . '<br>';
                    $functions[] = $value[1];
                    $old = $chekid; 
        }
    }
?>

Result in this case is:

307 -|- johannes -|- 5
307 -|- randomding -|- 31
307 -|- watdoetjho -|- 43

Answer 5

You can use get_defined_functions() before and after you include the file, and look at what gets added to the array the second time. Since they appear to be in order of definition, you can just use the index like this:

  $functions = get_defined_functions();
  $last_index = array_pop(array_keys($functions['user']));
  // Include your file here.
  $functions = get_defined_functions();
  $new_functions = array_slice($functions['user'], $last_index);

Answer 6

Finding string (eg. Function names) in a file is simple with regex. Just read the file and parse the content using preg_match_all.

I wrote a simple function to get list of functions in a file.

https://gist.github.com/komputronika/f92397b4f60870131ef52930faf09983

$a = functions_in_file( "mylib.php" );