‘AND’ vs ‘&&’ operators in PHP

The difference is the precedence when we compare AND with && operator. The precedence of AND operator is lower than the operator = when the evaluation is performed, therefore even if both the operators do the same work, the result is different.

Example

Let us first see an example of the AND operator−

 Live Demo

<?php
   $val1 = 55;
   $val2 = 65;
   if ($val1 == 55 and $val2 == 65)
      echo "Result = True";
   else
      echo "Result = False";
?>

Output

This will produce the following output−

Result = True

Example

Let us now see an example of the && operator−

 Live Demo

<?php
   $val1 = 110;
   $val2 = 110;
   if ($val1 == 110 && $val2 == 110)
      echo "Result = True";
   else
      echo "Result = False";
?>

Output

This will produce the following output:

Result = True

Example

Let us now see the difference in a single example −

 Live Demo

<?php
   $bool = TRUE and FALSE;
   echo ($bool ? 'true' : 'false'), "\n";
   $bool = TRUE && FALSE;
   echo ($bool ? 'true' : 'false');
?>

Output

This will produce the following output−

true
false

AmitDiwan

Published on 24-Dec-2019 12:05:48

• Related Questions & Answers
• Validate input: replace all ‘a’ with ‘@’ and ‘i’ with ‘!’JavaScript
• What is the meaning and usage of ‘=&’ assignment operator in PHP?
• What is the use of ‘ALL’, ‘ANY’, ’SOME’, ’IN’ operators with MySQL subquery?
• Why in MySQL, we cannot use arithmetic operators like ‘=’, ‘<’ or ‘<>’ with NULL?
• Are ‘this’ and ‘super’ keywords in Java?
• Rearrange an array such that ‘arr[j]’ becomes ‘i’ if ‘arr[i]’ is ‘j’ in C++
• Comparing ‘cubic’ and ‘linear’ 1-D interpolation using SciPy library
• How to Use ‘cat’ and ‘tac’ Commands with Examples in Linux
• How can we create MySQL stored procedures without ‘BEGIN’ and ‘END’?
• Python program to replace first ‘K’ elements by ‘N’
• Replacing ‘public’ with ‘private’ in “main” in Java
• What is the significance of ‘^’ in PHP?
• What is the benefit of MySQL ‘IS NULL’ and ‘IS NOT NULL’?
• K-th digit in ‘a’ raised to power ‘b’ in C++
• ‘this’ keyword in C#