Several ways to write anonymous functions in PHP that people don’t know (with code)

Several ways to write anonymous functions in PHP that people don’t know

Common writing methods:

1. Traditional writing method

<pre class="brush:php;toolbar:false">
function timer () {
echo "hello world";
}
SwooleTimer::tick(2000, &#39;timer&#39;);

2. Closure writing method

<pre class="brush:php;toolbar:false">
SwooleTimer::tick(2000, function () {
echo "hello world";
});

Advanced writing method:

1. Traditional writing method

<pre class="brush:php;toolbar:false">
$str = "hello world";
function timer () {
global $str;
echo $str;
}
SwooleTimer::tick(2000, &#39;timer&#39;);

2. Closure writing method

<pre class="brush:php;toolbar:false">
$str = "hello world";
SwooleTimer::tick(2000, function () use ($str) {
echo $str;
});

Thank you all for reading, I hope you will benefit a lot.

This article is reproduced from: https://www.cnblogs.com/newmiracle/p/11875325.html

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