get_defined_functions

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

get_defined_functions — 定義済みの全ての関数を配列で返す

説明

get_defined_functions(bool $exclude_disabled = true): array

すべての定義済み関数を配列で返します。

パラメータ

exclude_disabled: 無効な関数を戻り値から除外するかどうかを指定します。

戻り値

この関数は、組込 (内部) 関数およびユーザー定義関数を共に含む定義済みの全ての関数のリストを有する多次元配列を返します。内部関数は、 $arr["internal"]、ユーザー定義関数は $arr["user"] によりアクセス可能となります (以下の例を参照ください)。

変更履歴

バージョン	説明
8.0.0	`exclude_disabled` のデフォルト値が、 `false` から `true` に変更されました。
7.0.15, 7.1.1	`exclude_disabled` パラメータが追加されました。

例

例1 get_defined_functions() の例

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

$arr = get_defined_functions();

print_r($arr);
?>

上の例の出力は、たとえば以下のようになります。

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
        )

)

参考

function_exists() - 指定した関数が定義されている場合に true を返す
get_defined_vars() - 全ての定義済の変数を配列で返す
get_defined_constants() - すべての定数の名前とその値を連想配列として返す
get_declared_classes() - 定義済のクラスの名前を配列として返す

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User Contributed Notes 5 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 ¶

22 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

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

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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