function_exists
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
?>
get_defined_functions
(PHP 4 >= 4.0.4, PHP 5)
get_defined_functions — Devuelve una matriz de todas las funciones definidas
Descripción
array get_defined_functions
( void
)
Obtiene una matriz de todas las funciones definidas.
Valores devueltos
Devuelve una matriz multidimensional que contiene una lisata de todas las funciones definidas, tanto de las incluidas (internas) como las definidas por el usuario. Las funciones internas serán accesibles mediante $arr["internal"], y las definidas por el usuario usando $arr["user"] (véase el ejemplo de abajo).
Ejemplos
Example #1 Ejemplo de get_defined_functions()
<?php
function mifila($id, $data)
{
return "<tr><th>$id</th><td>$data</td></tr>\n";
}
$arr = get_defined_functions();
print_r($arr);
?>
El resultado del ejemplo sería algo similar a:
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] => mifila
)
)
Ver también
- function_exists() - Devuelve TRUE si la función dada ha sido definida
- get_defined_vars() - Devuelve una matriz con todas las variables definidas
- get_defined_constants() - Returns an associative array with the names of all the constants and their values
- get_declared_classes() - Devuelve una matriz con los nombres de las clases definidas
add a note
User Contributed Notes
get_defined_functions
rob at webdimension dot co dot uk
01-Apr-2011 04:48
gmdebby at gmail dot com
14-Jan-2011 09:28
Note : get_defined_functions return lowercase names on Windows 7 with WampServer 2.1
ChaosKaizer
10-Jul-2008 02:13
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[$function_name]) );
}
?>
strrev xc.noxeh@ellij
04-Jun-2008 12:31
Please note that functions created with create_function() are not returned.
(However that might change in a later version)
spudinski at gmail dot com
01-Apr-2008 02:13
To search for a function.
<html>
<head>
<title>List of all Internal functions</title>
<style type="text/css">
body {
background-color: #FFFFFF;
color: #222222;
font-size: 11px;
font-family: arial, tahoma;
}
table {
color: #222222;
font-size: 11px;
font-family: arial, tahoma;
}
tr.found {
background-color: #66EE00;
font-weight: bold;
}
a:link {
color: #222222;
}
a:visited {
color: #CCCCCC;
}
a:active {
color: #444444;
}
a:hover {
text-decoration: underline;
}
</style>
</head>
<body>
<p>
<form method="GET">
Search: <input type="text" name="search"><br>
<input type="submit">
</form>
</p>
<?php
if (!empty($_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 01:46
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 09:47
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
28-Mar-2003 12:30
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 10:47
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 05:28
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> </td>\n";
?>
</table>
</body>
</html>