PHP Logical Operators: Making Logical Decisions in PHP
☰Fullscreen
Table of Content:
The PHP logical operators are used to combine conditional statements.
| Operator | Name | Example | Result |
|---|---|---|---|
| and | And | $x and $y | True if both $x and $y are true |
| or | Or | $x or $y | True if either $x or $y is true |
| xor | Xor | $x xor $y | True if either $x or $y is true, but not both |
| && | And | $x && $y | True if both $x and $y are true |
| || | Or | $x || $y | True if either $x or $y is true |
| ! | Not | !$x | True if $x is not true |
Example: $x and $y
True if both $x and $y are true
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"> $y </span><span class="pun">=</span><span class="pln"> </span><span class="lit">60</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">$x </span><span class="pun">==</span><span class="pln"> </span><span class="lit">50</span><span class="pln"> </span><span class="kwd">and</span><span class="pln"> $y </span><span class="pun">==</span><span class="pln"> </span><span class="lit">60</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> echo </span><span class="str">"Happy Code!"</span><span class="pun">;</span><span class="pln"> </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="typ">Happy</span><span class="pln"> </span><span class="typ">Code</span><span class="pun">!</span><span class="pln"> </span>
Example: $x or $y
True if either $x or $y is true
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">60</span><span class="pun">;</span><span class="pln"> $y </span><span class="pun">=</span><span class="pln"> </span><span class="lit">50</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">$x </span><span class="pun">==</span><span class="pln"> </span><span class="lit">60</span><span class="pln"> </span><span class="kwd">or</span><span class="pln"> $y </span><span class="pun">==</span><span class="pln"> </span><span class="lit">80</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> echo </span><span class="str">"Happy Code!"</span><span class="pun">;</span><span class="pln"> </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="typ">Happy</span><span class="pln"> </span><span class="typ">Code</span><span class="pun">!</span><span class="pln"> </span>
Example: $x xor $y
True if either $x or $y is true, but not both
True if either $x or $y is true, but not both
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">60</span><span class="pun">;</span><span class="pln"> $y </span><span class="pun">=</span><span class="pln"> </span><span class="lit">50</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">$x </span><span class="pun">==</span><span class="pln"> </span><span class="lit">60</span><span class="pln"> xor $y </span><span class="pun">==</span><span class="pln"> </span><span class="lit">80</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> echo </span><span class="str">"Happy Code!"</span><span class="pun">;</span><span class="pln"> </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="typ">Happy</span><span class="pln"> </span><span class="typ">Code</span><span class="pun">!</span><span class="pln"> </span>
Example: $x && $y
True if both $x and $y are true
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">60</span><span class="pun">;</span><span class="pln"> $y </span><span class="pun">=</span><span class="pln"> </span><span class="lit">50</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">$x </span><span class="pun">==</span><span class="pln"> </span><span class="lit">60</span><span class="pln"> </span><span class="pun">&&</span><span class="pln"> $y </span><span class="pun">==</span><span class="pln"> </span><span class="lit">50</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> echo </span><span class="str">"Happy Code!"</span><span class="pun">;</span><span class="pln"> </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="typ">Happy</span><span class="pln"> </span><span class="typ">Code</span><span class="pun">!</span><span class="pln"> </span>
Example: $x || $y
True if either $x or $y is true
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">60</span><span class="pun">;</span><span class="pln"> $y </span><span class="pun">=</span><span class="pln"> </span><span class="lit">50</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">$x </span><span class="pun">==</span><span class="pln"> </span><span class="lit">60</span><span class="pln"> </span><span class="pun">||</span><span class="pln"> $y </span><span class="pun">==</span><span class="pln"> </span><span class="lit">80</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> echo </span><span class="str">"Happy Code!"</span><span class="pun">;</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">?></span><span class="pln"> </span><span class="tag"></body></span><span class="pln"> </span><span class="tag"></html></span><span class="pln"> </span>
Output:
This will produce the following result
<span class="pln"> </span><span class="typ">Happy</span><span class="pln"> </span><span class="typ">Code</span><span class="pun">!</span><span class="pln"> </span>
Example: !$x
True if $x is not true
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 $x </span><span class="pun">=</span><span class="pln"> </span><span class="lit">70</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">$x </span><span class="pun">!==</span><span class="pln"> </span><span class="lit">90</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> echo </span><span class="str">"Happy Code!"</span><span class="pun">;</span><span class="pln"> </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="typ">Happy</span><span class="pln"> </span><span class="typ">Code</span><span class="pun">!</span><span class="pln"> </span>
No Program Data.