Topic: PHP / MySQLPrev|Next
Answer: Use the PHP array_filter() function
You can simply use the PHP array_filter() function to remove or filter empty values from an array. This function typically filters the values of an array using a callback function.
However, if no callback function is specified, all empty entries of array will be removed, such as "" (an empty string), 0 (0 as an integer), 0.0 (0 as a float), "0" (0 as a string), NULL, FALSE and array() (an empty array). Let's try out an example to understand how it actually works:
Example
<?php$array = array("apple", "", 0, 2, null, -5, "0", "orange", 10, false);var_dump($array);echo "<br>"; // Filtering the array$result = array_filter($array); var_dump($result);?>In the above example the values 0 and "0" are also removed from the array. If you want to keep them, you can define a callback function as shown in the following example:
Example
<?php$array = array("apple", "", 0, 2, null, -5, "0", "orange", 10, false);var_dump($array);echo "<br>"; // Defining a callback functionfunction myFilter($var){ return ($var !== NULL && $var !== FALSE && $var !== "");}// Filtering the array$result = array_filter($array, "myFilter"); var_dump($result);?>The callback function myFilter() is called for each element of the array. If myFilter() returns TRUE, then that element will be appended to the result array, otherwise not.
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