PHP deletes the specified key (full version, encapsulated into function, with test code) in array arrays

problem background: Array is generally key---value storage, we sometimes need to delete the specified key and corresponding value. But I do not know why, so many of the posts are talking about knowing the value, and delete the value of things, almost misled me.

Now I am writing the full version of the Code attached:

function Array_remove ($data, $key) {    if (!array_key_exists ($key, $data)) {        return $data;    }    $keys = Array_keys ($data);    $index = Array_search ($key, $keys);    if ($index!== FALSE) {        array_splice ($data, $index, 1);    }    return $data;} $data = Array (' name ' = ' apple ', ' age ' =>12, ' address ' = ' Chinaguangzhou '); $result = Array_remove ($data, ' name ') ; Var_dump ($result);

Additional notes:

1, in fact, the problem is array_search this function, the function according to value to search, get the position, if not found on the return null or false;

2, therefore, in the key to find the corresponding position of key, need to find in the $keys, this is the reason to call Array_keys

3, because array_search this function may return null and false, so the absolute comparison must be used! = =

Reference:

PHP Official Document: http://www.php100.com/cover/php/189.html

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