English
English
In PHP, the basic assignment operator is used to assign a value to a variable. This operator is represented by the equals sign (=).
For example, the following code assigns the number 5 to the variable $x and the string "Hello World" to the variable $y:
<span class="fun">$x = 5;</span>
<span class="fun">$y = "Hello World";</span>
At this point, $x has a value of 5, and $y has a value of "Hello World".
In PHP, variables can be assigned the result of an expression, not just constants.
For example, the following code assigns the sum of variables $a and $b to the variable $c:
<span class="fun">$a = 5;</span>
<span class="fun">$b = 10;</span>
<span class="fun">$c = $a + $b;</span>
<span class="fun">echo $c; // Outputs 15</span>
At this point, $c has a value of 15.
When using the basic assignment operator, a variable can also be assigned a null value, which means the variable has no value.
For example, the following code assigns null to the variable $x:
<span class="fun">$x = null;</span>
At this point, $x has a value of null, meaning it's empty.
PHP allows developers to assign values to multiple variables in a single line of code.
For example, the following code assigns the values 1, 2, and 3 to the variables $x, $y, and $z:
<span class="fun">$x = 1;</span>
<span class="fun">$y = 2;</span>
<span class="fun">$z = 3;</span>
Then, using the list() function, the variables are reassigned new values:
<span class="fun">list($x, $y, $z) = array($y, $z, $x); // Now $x = 2, $y = 3, $z = 1</span>
At this point, $x has a value of 2, $y has a value of 3, and $z has a value of 1.
PHP also allows chaining assignment operations in a single line of code, making the code more concise.
For example, the following code assigns the value 1 to the variables $x, $y, and $z at once:
<span class="fun">$x = $y = $z = 1;</span>
At this point, all three variables have a value of 1.
