PHP Assignment Operators: Efficient Variable Assignments
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Table of Content:
- Example: The left operand gets set to the value of the expression on the right
- Output:
- Example: Addition
- Output:
- Example: Subtraction
- Output:
- Example: Multiplication
- Output:
- Example: Division
- Output:
- Example: Modulus
- Output:
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The PHP assignment operators are used with numeric values to write a value to a variable.
The basic assignment operator in PHP is "=". It means that the left operand gets set to the value of the assignment expression on the right.
| Assignment | Same as... | Description |
|---|---|---|
| x = y | x = y | The left operand gets set to the value of the expression on the right |
| x += y | x = x + y | Addition |
| x -= y | x = x - y | Subtraction |
| x *= y | x = x * y | Multiplication |
| x /= y | x = x / y | Division |
| x %= y | x = x % y | Modulus |
Example: The left operand gets set to the value of the expression on the right
Code:
<span class="pln"> </span><span class="dec"><!DOCTYPE html></span><span class="pln"> </span><span class="tag"><html></span><span class="pln"> </span><span class="tag"><body></span><span class="pln"> </span><span class="pun"><?</span><span class="pln">php $x </span><span class="pun">=</span><span class="pln"> </span><span class="lit">10</span><span class="pun">;</span><span class="pln"> echo $x</span><span class="pun">;</span><span class="pln"> </span><span class="pun">?></span><span class="pln"> </span><span class="tag"></body></span><span class="pln"> </span><span class="tag"></html></span><span class="pln"> </span>
Output:
This will produce the following result
<span class="pln"> </span><span class="lit">10</span><span class="pln"> </span>
Example: Addition
Code:
<span class="pln"> </span><span class="dec"><!DOCTYPE html></span><span class="pln"> </span><span class="tag"><html></span><span class="pln"> </span><span class="tag"><body></span><span class="pln"> </span><span class="pun"><?</span><span class="pln">php $x </span><span class="pun">=</span><span class="pln"> </span><span class="lit">20</span><span class="pun">;</span><span class="pln"> $x </span><span class="pun">+=</span><span class="pln"> </span><span class="lit">100</span><span class="pun">;</span><span class="pln"> echo $x</span><span class="pun">;</span><span class="pln"> </span><span class="pun">?></span><span class="pln"> </span><span class="tag"></body></span><span class="pln"> </span><span class="tag"></html></span><span class="pln"> </span>
Output:
This will produce the following result
<span class="pln"> </span><span class="lit">120</span><span class="pln"> </span>
Example: Subtraction
Code:
<span class="pln"> </span><span class="dec"><!DOCTYPE html></span><span class="pln"> </span><span class="tag"><html></span><span class="pln"> </span><span class="tag"><body></span><span class="pln"> </span><span class="pun"><?</span><span class="pln">php $x </span><span class="pun">=</span><span class="pln"> </span><span class="lit">50</span><span class="pun">;</span><span class="pln"> $x </span><span class="pun">-=</span><span class="pln"> </span><span class="lit">30</span><span class="pun">;</span><span class="pln"> echo $x</span><span class="pun">;</span><span class="pln"> </span><span class="pun">?></span><span class="pln"> </span><span class="tag"></body></span><span class="pln"> </span><span class="tag"></html></span><span class="pln"> </span>
Output:
This will produce the following result
<span class="pln"> </span><span class="lit">20</span><span class="pln"> </span>
Example: Multiplication
Code:
<span class="pln"> </span><span class="dec"><!DOCTYPE html></span><span class="pln"> </span><span class="tag"><html></span><span class="pln"> </span><span class="tag"><body></span><span class="pln"> </span><span class="pun"><?</span><span class="pln">php $x </span><span class="pun">=</span><span class="pln"> </span><span class="lit">10</span><span class="pun">;</span><span class="pln"> $y </span><span class="pun">=</span><span class="pln"> </span><span class="lit">6</span><span class="pun">;</span><span class="pln"> echo $x </span><span class="pun">*</span><span class="pln"> $y</span><span class="pun">;</span><span class="pln"> </span><span class="pun">?></span><span class="pln"> </span><span class="tag"></body></span><span class="pln"> </span><span class="tag"></html></span><span class="pln"> </span>
Output:
This will produce the following result
<span class="pln"> </span><span class="lit">60</span><span class="pln"> </span>
Example: Division
Code:
<span class="pln"> </span><span class="dec"><!DOCTYPE html></span><span class="pln"> </span><span class="tag"><html></span><span class="pln"> </span><span class="tag"><body></span><span class="pln"> </span><span class="pun"><?</span><span class="pln">php $x </span><span class="pun">=</span><span class="pln"> </span><span class="lit">10</span><span class="pun">;</span><span class="pln"> $x </span><span class="pun">/=</span><span class="pln"> </span><span class="lit">5</span><span class="pun">;</span><span class="pln"> echo $x</span><span class="pun">;</span><span class="pln"> </span><span class="pun">?></span><span class="pln"> </span><span class="tag"></body></span><span class="pln"> </span><span class="tag"></html></span><span class="pln"> </span>
Output:
This will produce the following result
<span class="pln"> </span><span class="lit">2</span><span class="pln"> </span>
Example: Modulus
Code:
<span class="pln"> </span><span class="dec"><!DOCTYPE html></span><span class="pln"> </span><span class="tag"><html></span><span class="pln"> </span><span class="tag"><body></span><span class="pln"> </span><span class="pun"><?</span><span class="pln">php $x </span><span class="pun">=</span><span class="pln"> </span><span class="lit">15</span><span class="pun">;</span><span class="pln"> $x </span><span class="pun">%=</span><span class="pln"> </span><span class="lit">4</span><span class="pun">;</span><span class="pln"> echo $x</span><span class="pun">;</span><span class="pln"> </span><span class="pun">?></span><span class="pln"> </span><span class="tag"></body></span><span class="pln"> </span><span class="tag"></html></span><span class="pln"> </span>
Output:
This will produce the following result
<span class="pln"> </span><span class="lit">3</span><span class="pln"> </span>
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