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This article mainly explains "what does as refer to in php". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what does as mean in php"?

In PHP, as is the meaning of the elements in the traversed array expressed by an avatar variable. As is used in the foreach statement, which is a method of traversing the array. The syntax is "foreach (array_expression as $value) {statement}".

This article operating environment: Windows10 system, PHP7.1 version, Dell G3 computer

What does as mean in php

As is used in the foreach statement, which means that the elements in the array to be traversed are represented by an avatar variable.

PHP 4 introduces the foreach structure, which is an easy way to traverse arrays. Foreach can only be used with arrays, and an error occurs when you try to use it with another data type or an uninitialized variable.

There are two grammars, the second is a minor but the first useful extension.

Foreach (array_expression as $value) {statement} foreach (array_expression as $key = > $value) {statement}

$value,$key is equivalent to a loop variable, such as $I in a for loop. You can choose a name at will, which in turn equals the value and subscript of each element of the array in the loop.

The first format iterates through a given array_expression array. In each loop, the value of the current unit is assigned to $value and the pointer inside the array moves forward (so you will get the next cell in the next loop).

The second format does the same thing, except that the key name of the current unit is assigned to the variable $key in each loop.

Examples are as follows:

$a = array ('Tom','Mary','Peter','Jack')

We use the first foreach method to output.

Foreach ($an as $value) {echo $value. ";}

The final result is:

At this point, I believe that everyone has a deeper understanding of "what as refers to in php". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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