How to filter strings and just allow a-z and A-Z and /or numbers
This is how you can filter strings and just allow a-z and A-Z and /or numbers.
<?php
//Allow only a-z, A-Z and 0-9
if(ctype_alnum($value) > 0) {
$tags_array[] = $value;
}
//Allow only a-z and A-Z
if(ctype_alpha($value) > 0) {
$tags_array[] = $value;
}
?>Read more about ctype_alnum() or ctype_alpha()