get_defined_functions

(PHP 4 >= 4.0.4, PHP 5)

get_defined_functions — Returns an array of all defined functions

Description

array get_defined_functions ( void )

Gets an array of all defined functions.

Return Values

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).

Examples

Example #1 get_defined_functions() example


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

$arr = get_defined_functions();

print_r($arr);
?>

The above example will output something similar to:

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
        )

)


for user defined function



<?php

/**

 * @param string $function_name The user function name, as a string.

 * @return Returns TRUE if function_name  exists and is a function, FALSE otherwise.

 */

function user_func_exists($function_name = 'do_action') {

   

    $func = get_defined_functions();

   

    $user_func = array_flip($func['user']);

   

    unset($func);

   

    return ( isset($user_func[$function_name]) );   

}

?>

strrev xc.noxeh@ellij
04-Jun-2008 08:31


Please note that functions created with create_function() are not returned.

(However that might change in a later version)

spudinski at gmail dot com
01-Apr-2008 10:13


To search for a function.

<html>

<head>

<title>List of all Internal functions</title>

<style type="text/css">

body {

    background-color: #FFFFFF;

    color: #222222;

    font-size: 11px;

    font-family: arial, tahoma;

}

table {

    color: #222222;

    font-size: 11px;

    font-family: arial, tahoma;

}

tr.found {

    background-color: #66EE00;

    font-weight: bold;

}

a:link {

    color: #222222;

}

a:visited {

    color: #CCCCCC;

}

a:active {

    color: #444444;

}

a:hover {

    text-decoration: underline;

}

</style>

</head>

<body>

<p>

    <form method="GET">

    Search: <input type="text" name="search"><br>

    <input type="submit">

    </form>

</p>

<?php

    if (!empty($_GET['search'])) {

        echo '<p>' . '<a href="#' . $_GET['search'] . '">' .

        'Goto ' . $_GET['search'] . '</a>' . 

        '<script type="text/javascript">

            window.onload = function() {

                document.location += "#' . $_GET['search'] . '";

                return true;

            }

        </script>

        </p>';

    }

?>

<p>

    <table>

<?php

    $country = 'us';

    $functions = get_defined_functions();

    $functions = $functions['internal'];

    $num = 0;

    foreach($functions as $function) {

        $num++;

        echo '<tr ' . (($_GET['search'] == $function) ? 'class="found"' : '') . '><td>' . 

        number_format($num) . '</td><td>' . '<a name="' . $function . '" href="http://' . $country . '.php.net/' . 

        $function . '">' . $function . '</a>' . '</td></tr>';

    }

?>

    </table>

</p>

</body>

</html>

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.





<?php


$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
27-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:





<?php


// 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
21-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
02-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>

add a note

register_shutdown_function

function_exists

Last updated: Fri, 10 Oct 2008

get_defined_functions

Description

Return Values

Examples

See Also