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get_defined_functions

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

get_defined_functionsLiefert 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

add a note add a note

User Contributed Notes 11 notes

up
12
kkuczok at gmail dot com
8 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
6
peten at spam dot me dot not dot frontiernet dot net
19 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
8
mIHATESPAMduskis at bates dot edu
18 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
5
strrev xc.noxeh@ellij
13 years ago
Please note that functions created with create_function() are not returned.
(However that might change in a later version)
up
4
berchentreff at berchentreff dot de
15 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
1
Muneeb Aslam
5 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 />";
         }
     }
   
?>
up
1
spudinski at gmail dot com
13 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>
up
1
Nguyet.Duc
10 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)
up
1
Muneeb Aslam
5 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 />";
        }
    }
   
?>
up
0
rob at webdimension dot co dot uk
10 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
?>
up
0
ChaosKaizer
13 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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