get_defined_functions

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

get_defined_functions — Liefert ein Array aller definierten Funktionen

Beschreibung

get_defined_functions(bool $exclude_disabled = true): array

Gibt ein Array aller definierten Funktionen zurück.

Parameter-Liste

exclude_disabled: Gibt an, ob deaktivierte Funktion im Rückgabewert ausgeschlossen werden sollen.

Rückgabewerte

Gibt ein multidimensionales Array mit der Liste aller definierten internen und benutzerdefinierten Funktionen zurück. Die internen Funktionen finden sich im Unterarray $arr["internal"], die benutzerdefinierten in $arr["user"] (siehe auch das folgende Beispiel).

Changelog

Version	Beschreibung
8.0.0	Der Standardwert des Parameters `exclude_disabled` wurde von `false` auf `true` geändert.
7.0.15, 7.1.1	Der Parameter `exclude_disabled` wurde hinzugefügt.

Beispiele

Beispiel #1 get_defined_functions()-Beispiel

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

$arr = get_defined_functions();

print_r($arr);
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

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
        )

)

Siehe auch

function_exists() - Falls die angegebene Funktion definiert ist, wird true zurück gegeben
get_defined_vars() - Gibt ein Array aller definierten Variablen zurück
get_defined_constants() - Returns an associative array with the names of all the constants and their values
get_declared_classes() - Ermittelt die Namen der definierten Klassen

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User Contributed Notes 11 notes

down

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] )

)

down

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.

down

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>

down

strrev xc.noxeh@ellij ¶

16 years ago

Please note that functions created with create_function() are not returned.
(However that might change in a later version)

down

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>

down

spudinski at gmail dot com ¶

16 years ago

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>

down

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 />";
        }
    }
    
?>

down

Muneeb Aslam ¶

9 years ago

We can also get the function names with this simple foreach

<?php
    
    //Since its a two dimensional array
    $functions = get_defined_functions();
     
    //We can use nested foreach to get the function names
    foreach($functions as $function){
         foreach($function as $thisFunc){
             echo $thisFunc . "<br />";
         }
     }
    
?>

down

Nguyet.Duc ¶

13 years ago

get_defined_functions() just returns a list of function names without function arguments. Here is the code to list user-defined function names plus arguments:

<?php
    $content = file_get_contents('example.php');
    preg_match_all("/(function )(\S*\(\S*\))/", $content, $matches);
    foreach($matches[2] as $match) {
        $function[] = "// " . trim($match) . "<br />\n";
    }
    natcasesort($function);
    $functionlist .= "/* Functions in this file */<br />\n";
    $functionlist .= "/**************************/<br />\n\n";
    $functionlist .= implode('', $function);
    echo $functionlist;
?>

Output:

/* Functions in this file */
/**************************/
// add_data($data)
// add_files($list)
// archive($name)
// bzip_file($name)

down

rob at webdimension dot co dot uk ¶

13 years ago

A quick way of using this function:



<?php

// ALL USER DEFINED FUNCTIONS

$arr = get_defined_functions();

foreach ($arr['user'] as $key => $value){

echo $value.'<br />';

}

// ALL USER DEFINED FUNCTIONS



// ALL INTERNAL FUNCTIONS

$arr = get_defined_functions();

foreach ($arr['internal'] as $key => $value){

echo $value.'<br />';

}

// ALL INTERNAL FUNCTIONS

?>

down

ChaosKaizer ¶

16 years ago

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]) );   
}
?>

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