What does = mean in php

The = symbol in php is the basic assignment operator in PHP. The assignment form is such as "z=x y", which means that the assignment expression on the right side will set the value for the left operand.

The operating environment of this article: windows7 system, PHP7.4 version, DELL G3 computer

What does = mean in php?

The basic assignment operator in PHP is "=". This means that the right-hand assignment expression sets the value of the left-hand operand.

For example, z=x y, the expression on the right side sets the value of the operand on the left side.

There are many situations of PHP assignment:

Direct assignment: assignment symbol "=", the variable is in front of the assignment symbol, and the assigned value is behind; the example is as follows:

<?php
$a=10;
$b=&#39;baiduzhidao&#39;;

Transfer assignment: assign the value of an expression to a variable (changing the value of one variable will not affect the value of the other variable); examples are as follows:

<?php
$num1=100;
$num2=$num1;//传值赋值后，$num2的值为：100

Reference assignment: assignment symbol "& ", when the new variable refers to the value of the original variable, changing the new variable will affect the original variable. Examples are as follows:

<?php
$a=3;
$b=5;
$a=&$b;        //把$b的地址赋值给$a, 这时$a的值也是5了。如果修改$b的值，那么$a的值也会发生变化。

Recommended learning: "PHP Video Tutorial"

The above is the detailed content of What does = mean in php. For more information, please follow other related articles on the PHP Chinese website!