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PHP Exercises : Get PHP version and configuration information

PHP : Exercise-1 with Solution

Write a PHP script to get the PHP version and configuration information.

Sample Solution: -

PHP Code:

<?php
phpinfo();
?>

Note: phpinfo() outputs a large amount of information about the current state of PHP. This includes information about PHP compilation options and extensions, the PHP version, server information and environment, the PHP environment, OS version information, paths, master and local values of configuration options, HTTP headers, and the PHP License.

Sample Output: 

phpinfo()                                                   
PHP Version => 5.6.11-1ubuntu3.4                            
                                                            
System => Linux server 4.4.0-47-generic #68-Ubuntu SMP Wed O
ct 26 19:39:52 UTC 2016 x86_64                              
Server API => Command Line Interface                        
Virtual Directory Support => disabled                       
Configuration File (php.ini) Path => /etc/php5/cli          
Loaded Configuration File => /etc/php5/cli/php.ini          
Scan this dir for additional .ini files => /etc/php5/cli/con
f.d                                                         
Additional .ini files parsed => /etc/php5/cli/conf.d/05-opca
che.ini,                                                    
/etc/php5/cli/conf.d/10-pdo.ini,                            
/etc/php5/cli/conf.d/20-gd.ini,                             
/etc/php5/cli/conf.d/20-json.ini,                           
/etc/php5/cli/conf.d/20-readline.ini,                       
/etc/php5/cli/conf.d/20-ssh2.ini

......

PHP License                                                 
This program is free software; you can redistribute it and/o
r modify                                                    
it under the terms of the PHP License as published by the PH
P Group                                                     
and included in the distribution in the file:  LICENSE      
                                                            
This program is distributed in the hope that it will be usef
ul,                                                         
but WITHOUT ANY WARRANTY; without even the implied warranty 
of                                                          
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.        
                                                            
If you did not receive a copy of the PHP license, or have an
y                                                           
questions about PHP licensing, please contact [email protected]
t.

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PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC