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This article mainly introduces "how to use the unset function in php". In daily operation, I believe many people have doubts about how to use the unset function in php. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to use the unset function in php". Next, please follow the editor to study!

Description

1. The unset function releases a given variable. By using this function, you can delete blank elements from the array.

2. This function accepts the index and deletes the elements that exist on the specified index.

Grammar

Void unset (mixed $var [, mixed $...])

Parameters.

$var: the variable to destroy.

Return value

There is no return value.

Example

/ * * $arr = array ('', 'test','); * dump ($arr); only 'test' * $arr = www.why114.com; * $arr = www.92jzh.com; * / public function removeEmpty ($arr, $trim = TRUE) {foreach ($arr as $key = > $value) {if ($value)) {self::removeEmpty ($arr [$key]) in the output } else {$value = trim ($value); if ($value = =') {unset ($arr [$key]);} elseif ($trim) {$arr [$key] = $value } at this point, the study on "how to use the unset function in php" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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