blocks|key|1268586|text|如果您使用的是PHP+5.3.0或更高版本，这是可能的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1268587|请参阅手册中的Anonymous+Functions。|offset|length|1268588|在您的例子中，您可以这样定义exampleMethod：|style|CODE|1268589|function+exampleMethod($anonFunc)+{
++++//execute+anonymous+function
++++$anonFunc();
}|code-block|syntax|javascript|1268590|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual/en/functions.anonymous.php^0|0|7|J|0|0|E|D|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|6|7|11|8|@$D|12|E|13|H|I]]|9|@]|A|$]]|$1|J|3|K|5|L|7|14|8|@]|9|@]|A|$M|N]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

<p>It's possible if you are using PHP 5.3.0 or higher.</p>

<p>See <a href="http://php.net/manual/en/functions.anonymous.php" rel="noreferrer">Anonymous Functions</a> in the manual.</p>

<p>In your case, you would define <code>exampleMethod</code> like this:</p>

<pre><code>function exampleMethod($anonFunc) {
    //execute anonymous function
    $anonFunc();
}
</code></pre>


blocks|key|1053958|text|为了添加其他函数，您可以传递一个函数名：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1053959|function+someFunc($a)
{
++++echo+$a;
}

function+callFunc($name)
{
++++$name('funky!');
}

callFunc('someFunc');|code-block|syntax|javascript|1053960|这将在PHP4中工作。|1053961|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|$]]

<p>Just to add to the others, you can pass a function name:</p>

<pre><code>function someFunc($a)
{
    echo $a;
}

function callFunc($name)
{
    $name('funky!');
}

callFunc('someFunc');
</code></pre>

<p>This will work in PHP4.</p>


blocks|key|1268654|text|您还可以使用create_function将函数创建为变量并将其传递。不过，我更喜欢anonymous+functions的感觉。僵尸来吧。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1268655|entityMap|0|LINK|mutability|MUTABLE|url|http://us3.php.net/manual/en/function.create-function.php|1|http://php.net/manual/en/functions.anonymous.php^0|6|F|0|16|J|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

<p>You can also use <a href="http://us3.php.net/manual/en/function.create-function.php" rel="noreferrer">create_function</a> to create a function as a variable and pass it around. Though, I like the feeling of <a href="http://php.net/manual/en/functions.anonymous.php" rel="noreferrer">anonymous functions</a> better. Go zombat. </p>


blocks|key|1054013|text|只需像这样编码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1054014|function+example($anon)+{
++$anon();
}

example(function(){
++//+some+codes+here
});|code-block|syntax|javascript|1054015|如果你能发明出这样的东西那就太好了(灵感来自Laravel+like+)：|1054016|Object::method("param_1",+function($param){
++$param->something();
});|1054017|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|$]]

<p>Just code it like this:</p>

<pre><code>function example($anon) {
  $anon();
}

example(function(){
  // some codes here
});
</code></pre>

<p>it would be great if you could invent something like this (inspired by Laravel Illuminate):</p>

<pre><code>Object::method("param_1", function($param){
  $param-&gt;something();
});
</code></pre>


blocks|key|1268904|text|根据@zombat的回答，最好先验证匿名函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1268905|function+exampleMethod($anonFunc)+{
++++//execute+anonymous+function
++++if+(is_callable($anonFunc))+{
++++++++$anonFunc();
++++}
}|code-block|syntax|javascript|1268906|或验证PHP+5.4.0以后的参数类型：|1268907|function+exampleMethod(callable+$anonFunc)+{}|1268908|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|$]]

<p>According to @zombat's answer, it's better to validate the Anonymous Functions first:</p>

<pre><code>function exampleMethod($anonFunc) {
    //execute anonymous function
    if (is_callable($anonFunc)) {
        $anonFunc();
    }
}
</code></pre>

<p>Or validate argument type since PHP 5.4.0:</p>

<pre><code>function exampleMethod(callable $anonFunc) {}
</code></pre>


blocks|key|1054126|text|PHP版本>=+5.3.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1054127|示例1:基础知识|1054128|function+test($test_param,+$my_function)+{
++++return+$my_function($test_param);
}

test("param",+function($param)+{
++++echo+$param;
});+//will+echo+"param"|code-block|syntax|javascript|1054129|示例2:+std对象|1054130|$obj+=+new+stdClass();
$obj->test+=+function+($test_param,+$my_function)+{
++++return+$my_function($test_param);
};

$test+=+$obj->test;
$test("param",+function($param)+{
++++echo+$param;
});|1054131|示例3:非静态类调用|1054132|class+obj{
++++public+function+test($test_param,+$my_function)+{
++++++++return+$my_function($test_param);
++++}
}

$obj+=+new+obj();
$obj->test("param",+function($param)+{
++++echo+$param;
});|1054133|示例4:静态类调用|1054134|class+obj+{
++++public+static+function+test($test_param,+$my_function)+{
++++++++return+$my_function($test_param);
++++}
}

obj::test("param",+function($param)+{
++++echo+$param;
});|1054135|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

<p>PHP VERSION >= 5.3.0</p>

<h3>Example 1: basic</h3>

<pre class="lang-php prettyprint-override"><code>function test($test_param, $my_function) {
    return $my_function($test_param);
}

test("param", function($param) {
    echo $param;
}); //will echo "param"
</code></pre>

<h3>Example 2: std object</h3>

<pre class="lang-php prettyprint-override"><code>$obj = new stdClass();
$obj-&gt;test = function ($test_param, $my_function) {
    return $my_function($test_param);
};

$test = $obj-&gt;test;
$test("param", function($param) {
    echo $param;
});
</code></pre>

<h3>Example 3: non static class call</h3>

<pre class="lang-php prettyprint-override"><code>class obj{
    public function test($test_param, $my_function) {
        return $my_function($test_param);
    }
}

$obj = new obj();
$obj-&gt;test("param", function($param) {
    echo $param;
});
</code></pre>

<h3>Example 4: static class call</h3>

<pre class="lang-php prettyprint-override"><code>class obj {
    public static function test($test_param, $my_function) {
        return $my_function($test_param);
    }
}

obj::test("param", function($param) {
    echo $param;
});
</code></pre>


blocks|key|1268813|text|使用类的简单示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1268814|class+test+{

++++public+function+works($other_parameter,+$function_as_parameter)
++++{

++++++++return+$function_as_parameter($other_parameter)+;

++++}

}

$obj+=+new+test()+;

echo+$obj->works('working+well',function($other_parameter){


++++return+$other_parameter;


});|code-block|syntax|javascript|1268815|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|$]]

<p>Simple example using a class :</p>

<pre><code>class test {

    public function works($other_parameter, $function_as_parameter)
    {

        return $function_as_parameter($other_parameter) ;

    }

}

$obj = new test() ;

echo $obj-&gt;works('working well',function($other_parameter){


    return $other_parameter;


});
</code></pre>


blocks|key|1268982|text|下面是一个简单的过程示例，说明如何对每个数据项验证使用单独的函数来实现多个数据项的验证，将其作为函数数组参数传递给主验证函数，并将要验证的数据(函数的参数)作为另一个数组参数传递给主验证函数。对于编写泛型代码以验证表单数据非常有用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1268983|<?php
function+valX($value)+{
++++echo+"<p>Validating+$value+==+5</p>";
++++if+($value+==+5)+{
++++++++return+true;
++++}+else+{
++++++++return+false;
++++}
}

function+valY($value)+{
++++echo+"<p>Validating+$value+==+6</p>";
++++if+($value+==+6)+{
++++++++return+true;
++++}+else+{
++++++++return+false;
++++}
}

function+validate($values,+$functions)+{
++++for+($i+=+0;+$i+<+count($values);+$i%2B%2B)+{
++++++++if+($functions[$i]($values[$i]))+{
++++++++++++echo+"<p>$values[$i]+passes+validation</p>";
++++++++}+else+{
++++++++++++echo+"<p>$values[$i]+fails+validation</p>";
++++++++}
++++}
}

$values+=+[5,+9];
$functions+=+['valX',+'valY'];
validate($values,+$functions);
?>|code-block|syntax|javascript|1268984|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|$]]

<p>Here is a simple procedural example of how you could implement validation of multiple data items using separate functions for each data item validation, passed as an array of functions argument to a master validations function, with the data to be validated (the arguments to the functions) passes as the other array argument to the master validation function.  Useful for writing generic code to validate form data.</p>
<pre><code>&lt;?php
function valX($value) {
    echo &quot;&lt;p&gt;Validating $value == 5&lt;/p&gt;&quot;;
    if ($value == 5) {
        return true;
    } else {
        return false;
    }
}

function valY($value) {
    echo &quot;&lt;p&gt;Validating $value == 6&lt;/p&gt;&quot;;
    if ($value == 6) {
        return true;
    } else {
        return false;
    }
}

function validate($values, $functions) {
    for ($i = 0; $i &lt; count($values); $i++) {
        if ($functions[$i]($values[$i])) {
            echo &quot;&lt;p&gt;$values[$i] passes validation&lt;/p&gt;&quot;;
        } else {
            echo &quot;&lt;p&gt;$values[$i] fails validation&lt;/p&gt;&quot;;
        }
    }
}

$values = [5, 9];
$functions = ['valX', 'valY'];
validate($values, $functions);
?&gt;
</code></pre>


<p>I've been wondering whether is possible or not to pass a function as parameter in PHP; I want something like when you're programming in JS:</p>

<pre><code>object.exampleMethod(function(){
    // some stuff to execute
});
</code></pre>

<p>What I want is to execute that function somewhere in exampleMethod. Is that possible in PHP?</p>


Accept function as parameter in PHP

我一直在想，在PHP中是否可以将函数作为参数传递；我希望在JS中编程时可以这样：object.exampleMethod(function(){    // some stuff to execute});我想要的是在exampleMethod中的某个地方执行这个函数。这在PHP中是可能的吗？

问接受函数作为PHP中的参数
EN

回答 8

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