get_defined_functions

    (PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

    get_defined_functions — Returns an array of all defined functions

    Description

    get_defined_functions(bool $exclude_disabled = true): array

    Gets an array of all defined functions.

    Parameters

    exclude_disabled

    Whether disabled functions should be excluded from the return value.

    Return Values

    Returns a 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).

    Changelog

    Version Description
    8.0.0 The default value of the exclude_disabled parameter has been changed from false to true.
    7.0.15, 7.1.1 The exclude_disabled parameter has been added.

    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
        )

)

    See Also

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    User Contributed Notes 5 notes

    up
    15
    kkuczok at gmail dot com
    11 years ago
    You can list all arguments using ReflectionFunction class. It's not necessary to parse selected files/files as suggested by Nguyet.Duc.

    http://php.net/manual/pl/class.reflectionfunction.php

    Example:
    <?php
    function foo(&$bar, $big, $small = 1) {}
    function     bar($foo) {}
    function     noparams() {}
    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);
    ?>

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

    [1] => function bar ( &foo )

    [2] => function noparams ( )

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

    )
    up
    10
    mIHATESPAMduskis at bates dot edu
    21 years ago
    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.
    up
    6
    peten at spam dot me dot not dot frontiernet dot net
    22 years ago
    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>
    up
    5
    berchentreff at berchentreff dot de
    18 years ago
    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>
    up
    2
    Muneeb Aslam
    9 years ago
    This is rather a simple non-confusing script to get the function names linked to its manual page on php.net. Hope it helps someone. Commented script is self explainatory

    <?php

    /*declare a variable to php manual of functions.
    change the $lng to the region you want it for,
    i-e en/es/de etc etc */
    $lng = "es";
    $url = "http://www.php.net/manual/".$lng."/function.";

    // get defined functions in a variable (it will be a 2D array)
    $functions = get_defined_functions();

    // Run nested foreach to get the function names
    foreach($functions as $function){
    foreach (    $function as $functionName){

    /* Since php manual is using hyphens instead of underscores
    for functions, we will convert underscores to hyphen whereever
    there is one. */
    if(strpos($functionName,"_") !== false){
    $functionForURL = str_replace("_","-",$functionName);
    } else {
    $functionForURL = $functionName;
    }

    /* echo the link */
    echo "<a href='".$url.$functionForURL.".php'>".$functionName."</a><br />";
    }
    }

    ?>
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