PHP Assignment Operator

By | March 29, 2014

Assignment Operators

Assignment operators are use to assign a specific value to variable. They are also use to change the existing value of a variable by adding or subtracting from the variable ‘s current value. A few examples are =, +=, -= and .=.
In PHP you can use more than one assignment operator in a single statement, as shown below:

 $a = ($b=4) + ($c=5);

The variable $a, $b and $c are now integer types and will hold the values 9, 4 and 5, respectively.

Operator Usage Output
= (equal to) $a = 9; Assign value 9 to variable $a;
+= (plus equal to) $a += 9; Adds the original value assign to the variable $a to 9. Now the value of $a will be 9.
-= (minus equal to) $a += 3; Subtract the number specified from the original value of $a. Now the value of $a will be 6.
.= (dot equal to) $a .=” new numbers.”; (add) the new value specified with the original value of the variable. Now the value of $a will be 9 new numbers.

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