blocks|key|1527960|text|$functionName()或call_user_func($functionName)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1527961|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual/en/functions.variable-functions.php|1|http://php.net/manual/en/function.call-user-func.php^0|0|F|G|T|0|F|0|G|T|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@$9|U|A|V|1|W]|$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]|N|$5|I|J|K|E|$L|O]]]]

<a href="http://php.net/manual/en/functions.variable-functions.php" rel="noreferrer"><code>$functionName()</code></a> or <a href="http://php.net/manual/en/function.call-user-func.php" rel="noreferrer"><code>call_user_func($functionName)</code></a>

blocks|key|1313319|text|我最喜欢的版本是内联版本：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1313320|${"variableName"}+=+12;

$className->{"propertyName"};
$className->{"methodName"}();

StaticClass::${"propertyName"};
StaticClass::{"methodName"}();|code-block|syntax|javascript|1313321|你也可以把变量或表达式放在括号里！|1313322|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

My favorite version is the inline version:

<pre><code>${"variableName"} = 12;

$className-&gt;{"propertyName"};
$className-&gt;{"methodName"}();

StaticClass::${"propertyName"};
StaticClass::{"methodName"}();
</code></pre>

You can place variables or expressions inside the brackets too!

blocks|key|1527929|text|是的，这是可能的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1527930|function+foo($msg)+{
++++echo+$msg."<br+/>";
}
$var1+=+"foo";
$var1("testing+1,2,3");|code-block|syntax|javascript|1527931|来源：http://www.onlamp.com/pub/a/php/2001/05/17/php_foundations.html?page=2|offset|length|1527932|entityMap|0|LINK|mutability|MUTABLE|url|http://www.onlamp.com/pub/a/php/2001/05/17/php_foundations.html?page=2^0|0|0|3|1Y|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Yes, it is possible:

<pre><code>function foo($msg) {
 echo $msg."&lt;br /&gt;";
}
$var1 = "foo";
$var1("testing 1,2,3");
</code></pre>

Source: <a href="http://www.onlamp.com/pub/a/php/2001/05/17/php_foundations.html?page=2" rel="noreferrer">http://www.onlamp.com/pub/a/php/2001/05/17/php_foundations.html?page=2</a>

blocks|key|1528324|text|正如已经提到的，有几种方法可以实现这一点，最安全的方法可能是call_user_func()，或者如果必须的话，您也可以沿着$function_name()的路线走下去。可以同时使用这两种方法传递参数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1528325|$function_name+=+'foobar';

$function_name(arg1,+arg2);

call_user_func_array($function_name,+array(arg1,+arg2));|code-block|syntax|javascript|1528326|如果您正在调用的函数属于某个对象，则仍然可以使用以下两种方法之一|1528327|$object->$function_name(arg1,+arg2);

call_user_func_array(array($object,+$function_name),+array(arg1,+arg2));|1528328|但是，如果您打算使用$function_name()方法，那么如果名称是动态的，那么测试函数是否存在可能是一个好主意|1528329|if(method_exists($object,+$function_name))
{
++++$object->$function_name(arg1,+arg2);
}|1528330|entityMap^0|U|G|1Q|G|0|0|0|0|A|G|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|H|7|15|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|T|$]]

As already mentioned, there are a few ways to achieve this with possibly the safest method being <code>call_user_func()</code> or if you must you can also go down the route of <code>$function_name()</code>. It is possible to pass arguments using both of these methods as so

<pre><code>$function_name = 'foobar';

$function_name(arg1, arg2);

call_user_func_array($function_name, array(arg1, arg2));
</code></pre>

If the function you are calling belongs to an object you can still use either of these

<pre><code>$object-&gt;$function_name(arg1, arg2);

call_user_func_array(array($object, $function_name), array(arg1, arg2));
</code></pre>

However if you are going to use the <code>$function_name()</code> method it may be a good idea to test for the existence of the function if the name is in any way dynamic

<pre><code>if(method_exists($object, $function_name))
{
 $object-&gt;$function_name(arg1, arg2);
}
</code></pre>

blocks|key|1313436|text|晚了几年，但这是现在最好的方式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1313437|$x+=+(new+ReflectionFunction("foo"))->getClosure();
$x();|code-block|syntax|javascript|1313438|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A few years late, but this is the best manner now imho:

<pre><code>$x = (new ReflectionFunction("foo"))-&gt;getClosure();
$x();
</code></pre>

blocks|key|1528226|text|出于完整性的考虑，您还可以使用eval()|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1528227|$functionName+=+"foo()";
eval($functionName);|code-block|syntax|javascript|1528228|但是，call_user_func()是正确的方式。|style|CODE|1528229|entityMap|0|LINK|mutability|MUTABLE|url|http://www.php.net/eval|1|http://php.net/manual/en/function.call-user-func.php^0|F|6|0|0|0|3|G|3|G|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@$A|12|B|13|K|L]]|9|@$A|14|B|15|1|16]]|C|$]]|$1|M|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

For the sake of completeness, you can also use <a href="http://www.php.net/eval" rel="nofollow noreferrer">eval()</a>:

<pre><code>$functionName = "foo()";
eval($functionName);
</code></pre>

However, <a href="http://php.net/manual/en/function.call-user-func.php" rel="nofollow noreferrer"><code>call_user_func()</code></a> is the proper way.

blocks|key|1528492|text|补充@Chris+K的答案如果你想调用一个对象的方法，你可以在闭包的帮助下使用一个变量来调用它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1528493|function+get_method($object,+$method){
++++return+function()+use($object,+$method){
++++++++$args+=+func_get_args();
++++++++return+call_user_func_array(array($object,+$method),+$args);+++++++++++
++++};
}

class+test{++++++++

++++function+echo_this($text){
++++++++echo+$text;
++++}
}

$test+=+new+test();
$echo+=+get_method($test,+'echo_this');
$echo('Hello');++//Output+is+"Hello"|code-block|syntax|javascript|1528494|我发布了另一个示例here|offset|length|1528495|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/27148640/428640^0|0|0|9|4|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Complementing the answer of @Chris K if you want to call an object's method, you can call it using a single variable with the help of a closure:

<pre><code>function get_method($object, $method){
 return function() use($object, $method){
 $args = func_get_args();
 return call_user_func_array(array($object, $method), $args); 
 };
}

class test{ 

 function echo_this($text){
 echo $text;
 }
}

$test = new test();
$echo = get_method($test, 'echo_this');
$echo('Hello'); //Output is "Hello"
</code></pre>

I posted another example <a href="https://stackoverflow.com/a/27148640/428640">here</a>

blocks|key|1527939|text|使用call_user_func函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1527940|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

blocks|key|1313393|text|下面的代码可以帮助你用PHP编写动态函数。现在，函数名可以通过变量'$current_page‘动态更改。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1313394|$current_page+=+'home_page';
$function+=+@${$current_page+.+'_page_versions'};
$function+=+function()+{
++++echo+'current+page';
};
$function();|code-block|syntax|javascript|1313395|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Following code can help to write dynamic function in PHP.
now the function name can be dynamically change by variable '$current_page'.

<pre><code>$current_page = 'home_page';
$function = @${$current_page . '_page_versions'};
$function = function() {
 echo 'current page';
};
$function();
</code></pre>

blocks|key|1528649|text|使用存储在变量中的名称安全地调用函数的最简单方法是，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1528650|//I+want+to+call+method+deploy+that+is+stored+in+functionname+
$functionname+=+'deploy';

$retVal+=+{$functionname}('parameters');|code-block|syntax|javascript|1528651|我已经使用如下代码在Laravel中动态创建了迁移表，|1528652|foreach(App\Test::$columns+as+$name+=>+$column){
++++++++$table->{$column[0]}($name);
}|1528653|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

The easiest way to call a function safely using the name stored in a variable is,

<pre><code>//I want to call method deploy that is stored in functionname 
$functionname = 'deploy';

$retVal = {$functionname}('parameters');
</code></pre>

I have used like below to create migration tables in Laravel dynamically,

<pre><code>foreach(App\Test::$columns as $name =&gt; $column){
 $table-&gt;{$column[0]}($name);
}
</code></pre>

blocks|key|1528724|text|如果你在一个对象上下文中试图动态调用一个函数，请尝试下面这样的代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1528725|$this->{$variable}();|code-block|syntax|javascript|1528726|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you were in a object context trying to call a function dynamically please try something like this code bellow:
<pre><code>$this-&gt;{$variable}();
</code></pre>

blocks|key|1313094|text|我不知道你为什么要用它，听起来一点也不好，但是如果只有少量的函数，你可以使用if/elseif+if结构。我不知道是否有直接的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1313095|类似于$foo+=+"bar"；$test+=+"foo"；echo+$$test；|1313096|应该返回bar，你可以尝试一下，但我认为这不适用于函数|1313097|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I dont know why u have to use that, doesnt sound so good to me at all, but if there are only a small amount of functions, you could use a if/elseif construct.
I dont know if a direct solution is possible.

something like
$foo = "bar";
$test = "foo";
echo $$test;

should return bar, you can try around but i dont think this will work for functions

I need to be able to call a function, but the function name is stored in a variable, is this possible? e.g:
<pre class="lang-php prettyprint-override"><code>function foo ()
{
 //code here
}

function bar ()
{
 //code here
}

$functionName = &quot;foo&quot;;
// I need to call the function based on what is $functionName
</code></pre>

How to call a function from a string stored in a variable?

我需要能够调用一个函数，但是函数名存储在一个变量中，这可能吗？例如：function foo (){    //code here}function bar (){    //code here}$functionName = "foo";// I need to call the function based on what is $functionName

问如何从存储在变量中的字符串调用函数？
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问如何从存储在变量中的字符串调用函数？EN

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问如何从存储在变量中的字符串调用函数？
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