Cannot assign an empty string to a string offset¶
Description¶
It is possible to access an individual character inside a string, and replace it with another character.
On the other hand, it is not possible to remove that character by using an empty string. The only allowed modification is a replacement: one character replace another character.
In fact, PHP will only use the first character, when trying to modify an offset with a string longer than one character.
Example¶
<?php
$string = 'ab d';
$string[2] = 'c'; // add c in the right place
$string[2] = ''; // error
$string[2] = 'Cdef'; // only sets the c
?>
Solutions¶
Use substr() to cut the string before and after, then concatenate them.
Replace the character with a space.