PHP Exercises : Compare the PHP version

PHP : Exercise-23 with Solution

Write a PHP script to compare the PHP version.

Note : Use version_compare() function and PHP_VERSION constant.

Sample Solution:

PHP Code:

<?php
// Check if PHP version is at least 6.0.0
if (version_compare(PHP_VERSION, '6.0.0') >= 0) {
    echo 'I am at least PHP version 6.0.0, my version: ' . PHP_VERSION . "\n";
}

// Check if PHP version is at least 5.3.0
if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
    echo 'I am at least PHP version 5.3.0, my version: ' . PHP_VERSION . "\n";
}

// Check if PHP version is at least 5.0.0
if (version_compare(PHP_VERSION, '5.0.0', '>=')) {
    echo 'I am using PHP 5, my version: ' . PHP_VERSION . "\n";
}

// Check if PHP version is less than 5.0.0
if (version_compare(PHP_VERSION, '5.0.0', '<')) {
    echo 'I am using PHP 4, my version: ' . PHP_VERSION . "\n";
}
?>

Explanation:

• Check PHP Version 6.0.0 or Higher:
• The version_compare() function compares the current PHP version (PHP_VERSION) with '6.0.0'.
• If the current version is at least 6.0.0, it echoes a message stating that the version is 6.0.0 or higher.
• Check PHP Version 5.3.0 or Higher:
• A similar version_compare() check is performed for '5.3.0'.
• If the current version is at least 5.3.0, it echoes a message confirming this along with the current version.
• Check if Using PHP 5:
• The code checks if the current version is at least 5.0.0 using version_compare() and echoes a message indicating that PHP 5 is being used.
• Check for PHP Version Less than 5.0.0:
• Finally, the code checks if the current version is less than 5.0.0.
• If true, it echoes a message indicating that PHP 4 is being used.
• Output of Current Version:
• Each condition outputs the current PHP version using the predefined constant PHP_VERSION.

Output:

I am at least PHP version 6.0.0, my version: 7.0.15-0ubuntu0.16.04.4
I am at least PHP version 5.3.0, my version: 7.0.15-0ubuntu0.16.04.4
I am using PHP 5, my version: 7.0.15-0ubuntu0.16.04.4  

Flowchart:

PHP Code Editor:

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