PHP Array Exercises : Difference of two multidimensional arrays
PHP Array: Exercise-57 with Solution
Write a PHP function to compares two multidimensional arrays and returns the difference.
Sample Solution:
PHP Code:
<?php
function key_compare($a,$b)
{
if($a===$b)
return 0;
return($a>$b)?1:-1;
}
function multidimenssional_array_diff($arr1, $arr2)
{
return array_diff_uassoc($arr1['c'], $arr2['c'],"key_compare");
}
//multidimenssional arrays
$color1=array('a'=>'White','b'=>'Red','c'=>array('a'=>'Green','b'=>'Blue','c'=>'Yellow'));
$color2=array('a'=>'White','b'=>'Red','c'=>array('a'=>'White','b'=>'Red','c'=>'Yellow'));
print_r(multidimenssional_array_diff($color1, $color2));
?>
Sample Output:
Array ( [a] => Green [b] => Blue )
Flowchart:

PHP Code Editor:
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Previous: Write a PHP script to create a two-dimensional array (4x4), initialized to 10.
Next: Write a PHP script to combine (using one array for keys and another for its values) the specified two arrays.
What is the difficulty level of this exercise?
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PHP: Tips of the Day
PHP: Where does PHP store the error log? (php5, apache, fastcgi, cpanel)
PHP stores error logs in /var/log/apache2 if PHP is an apache2 module. Shared hosts are often storing log files in your root directory /log subfolder. But...if you have access to a php.ini file you can do this:
error_log = /var/log/php-scripts.log
According to rinogo's comment: If you're using cPanel, the master log file you're probably looking for is stored (by default) at
/usr/local/apache/logs/error_log
If all else fails you can check the location of the log file using
<?php phpinfo(); ?>
Ref : https://bit.ly/2EffgH5
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