{"id":421,"date":"2021-03-15T07:15:24","date_gmt":"2021-03-15T07:15:24","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=421"},"modified":"2025-04-05T14:54:32","modified_gmt":"2025-04-05T14:54:32","slug":"php-and-operator","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-tutorial\/php-and-operator\/","title":{"rendered":"PHP AND Operator"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn about the PHP AND operator and how to use it to build a complex logical expression.<\/p>\n\n\n\n

Introduction to the PHP AND operator #<\/a><\/h2>\n\n\n\n

The logical AND operator accepts two operands and returns true<\/code> if both operands are true<\/code>; otherwise, it returns false<\/code>.<\/p>\n\n\n\n

PHP uses the and<\/code> keyword to represent the logical AND operator:<\/p>\n\n\n

expression1 and expression2<\/code><\/span><\/pre>\n\n\n
The following table illustrates the result of the and<\/code> operator:<\/p>\n\n\n\n
expression1<\/th>expression2<\/th>expression1 and expression2<\/th><\/tr><\/thead>
true<\/code><\/td>true<\/code><\/td>true<\/code><\/td><\/tr>
true<\/code><\/td>false<\/code><\/td>false<\/code><\/td><\/tr>
false<\/code><\/td>true<\/code><\/td>false<\/code><\/td><\/tr>
false<\/code><\/td>false<\/code><\/td>false<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Since PHP keywords are case-insensitive, the AND<\/code> and and<\/code> operators are the same:<\/p>\n\n\n
expression1 AND expression2<\/code><\/span><\/pre>\n\n\n
By convention, you should use the and<\/code> operator in the lowercase format.<\/p>\n\n\n\n
In addition to using the and<\/code> keyword, PHP uses &&<\/code> as the logical AND operator:<\/p>\n\n\n
expression1 && expression2<\/code><\/span><\/pre>\n\n\n
The &&<\/code> and and<\/code> operators return the same result. The only difference between the &&<\/code> and and<\/code> operators are their precedences.<\/p>\n\n\n\n
The and<\/code> operator has higher precedence than the &&<\/code> operator. The precedence of an operator specifies the order in which PHP evaluates.<\/p>\n\n\n\n
PHP AND operator examples #<\/a><\/h2>\n\n\n\n
Suppose you want to offer discounts to customers who buy more than three items at a price of more than 99. To determine whether customers can get a discount or not, you can use the AND operator as follows:<\/p>\n\n\n
<?php<\/span>\n\n$price = 100<\/span>;\n$qty = 5<\/span>;\n\n$discounted = $qty > 3<\/span> && $price > 99<\/span>;\n\n\nvar_dump($discounted);\n<\/span><\/code><\/span>Code language:<\/span> HTML, XML<\/span> (<\/span>xml<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
bool(true<\/span>)<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
If you change the $qty<\/code> to 2<\/code>, the $discounted<\/code> will be false<\/code> like this:<\/p>\n\n\n
<?php<\/span>\n\n$price = 100<\/span>;\n$qty = 2<\/span>;\n\n$discounted = $qty > 3<\/span> && $price > 99<\/span>;\n\nvar_dump($discounted);<\/span><\/code><\/span>Code language:<\/span> HTML, XML<\/span> (<\/span>xml<\/span>)<\/span><\/small><\/pre>\n\n\n
In practice, you’ll use the logical AND operator in the if<\/a>, if-else<\/a>, if-elseif<\/a>, while<\/a>, and do-while <\/a>statements.<\/p>\n\n\n\n
Short-circuiting #<\/a><\/h2>\n\n\n\n
When the value of the first operand is false<\/code>, the logical AND operator knows that the result must also be false<\/code>. In this case, it doesn’t evaluate the second operand. This process is called short-circuiting.<\/p>\n\n\n\n
See the following example:<\/p>\n\n\n
<?php<\/span>\n\n$debug = false<\/span>;\n$debug && print<\/span>('PHP and operator demo!'<\/span>);<\/span><\/code><\/span>Code language:<\/span> HTML, XML<\/span> (<\/span>xml<\/span>)<\/span><\/small><\/pre>\n\n\n
How it works.<\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n