get_defined_functions

Description

array get_defined_functions ( void )

This function returns an multidimensional array containing a list of all defined functions, both built-in (internal) and user-defined. The internal functions will be accessible via $arr["internal"], and the user defined ones using $arr["user"] (see example below).


<?php
function myrow($id, $data) 
{
    return "<tr><th>$id</th><td>$data</td></tr>\n";
}

$arr = get_defined_functions();

print_r($arr);
?>

Will output something along the lines of:

Array
(
    [internal] => Array
        (
            [0] => zend_version
            [1] => func_num_args
            [2] => func_get_arg
            [3] => func_get_args
            [4] => strlen
            [5] => strcmp
            [6] => strncmp
            ...
            [750] => bcscale
            [751] => bccomp
        )

    [user] => Array
        (
            [0] => myrow
        )

)

add a note User Contributed Notes

berchentreff at berchentreff dot de
31-Mar-2006 09:46


look at here, list all the defined function on your php-Version and give as well formatted output width links onto the php-manual:



<html><head>

<style type="text/css"><!--

li{font-family:Verdana,Arail,sans-serif;width:500px;margin-top:7px;}

a{padding:4px;}

a.a1{font-size:12px;background-color:#CCCCCC;color:#663300;}

a.a1:hover{background-color:#663300;color:#CCCCCC;}

a.a1:visited{background-color:#fff;color:#999;}

a.a1:visited:hover{background-color:#fff;color:#999;}

a.a0{font-size:12px;background-color:#CCCCFF;color:#663399;}

a.a0:hover{background-color:#663399;color:#CCCCFF;}

a.a0:visited{background-color:#ffC;color:#999;}

a.a0:visited:hover{background-color:#ffC;color:#999;}

--></style>

</head><body style="background-color:#999;">

<?php

$arr = get_defined_functions();



foreach($arr as $zeile){

sort($zeile);$s=0;

foreach($zeile as $bzeile){

$s=($s)?0:1;

echo "<li><a class='a".$s."'  href='http://de.php.net/".$bzeile."'>".$bzeile."</a></li>";}

}

?>

</body>

</html>

php dot net at schou dot dk
20-May-2003 05:47


Here is another example which list all the available functions and gives a link to the manual pages at the same time.



$manref = "http://www.php.net/manual/en/function";

$arr = get_defined_functions();

while (list($type,$list) = each($arr)) {

        if ($type == "internal" && is_array($list)) {

                sort($list);

                foreach ($list as $func) {

                        if ($func == "_")

                                $func2 = "gettext";

                        else

                                $func2 = preg_replace("/_/", "-", $func);

                        echo "<a href=\"$manref.$func2.php\">$func</a><br>\n";

                }

        }

}

kaneccc at seznam dot cz
28-Mar-2003 08:30


I've written simple XML-RPC server which automatically registers all defined functions starting with "RPC_" prefix and found, that with PHP 2.4.3 on Win32 and Linux platforms function names are in lowercase so the xmlrpc_server_call_method() is case sensitive which is correct with XML, but not with PHP and get_functions_defined()



I also suggest changing the function to have flags/options to return internal, user or both functions only and starting with prefix such as:



---

// constants

define( 'xxx_INTERNAL', 0x1 );

define( 'xxx_USER', 0x2 );

define( 'xxx_BOTH', 0x3 );



// declaration

array get_functions_defined( int options, string prefix );

---



with both arguments optional.



Johnnie

mIHATESPAMduskis at bates dot edu
22-Nov-2002 06:47


At least with PHP 4.2.3 on a GNU/Linux/Apache platform, get_defined_functions() returns user-defined functions as all-lower case strings regardless of how the functions are capitalized when they are defined.



Threw me for a loop.

peten at spam dot me dot not dot frontiernet dot net
03-Jun-2002 01:28


Here's a useful trick with the get_defined_functions function - show all available functions with a link to the documentation (you can even change the mirror it goes to):



<?php

  // the php mirror 

  $php_host = "http://us2.php.net/";



  // the number of cols in our table

  $num_cols = 3;



  $ar = get_defined_functions();

  $int_funct = $ar[internal];

  sort($int_funct);

  $count = count($int_funct);

?>

<html>

 <head>

  <title>

   Available PHP Functions

  </title>

 </head>

 <body>

  <p>

   <?php print $count; ?> functions     

    available on 

    <?php 

      print $_SERVER[SERVER_NAME]; 

     ?>

   (<a href="<?php print $php_host;?>" 

    target="phpwin">php</a>

    version 

    <?php print phpversion(); ?>)

  </p>

  <table align="center" border="2">

   <tr>  

<?php

  for($i=0;$i<$count;$i++) {

    $doc = $php_host 

     . "manual/en/function."

     . strtr($int_funct[$i], "_", "-") 

     . ".php";

    print "    <td><a href=\"" . $doc 

     . "\" target=\"phpwin\">" 

     . $int_funct[$i] 

     . "</a></td>\n";

    if(($i > 1) 

     && (($i+$num_cols)%$num_cols==($num_cols-1)))   

      print "   </tr>\n   <tr>\n";

    }

  for($i=($num_cols-($count%$num_cols));$i>0;$i--)  

    print "    <td>&nbsp;</td>\n";

?>

  </table>

 </body>

</html>

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