如何限制多维数组中的字符串长度？

Question

I have a 2-dimensional PHP array containing strings ($fulltable) which I'm trying to fit into the datables grid (https://www.datatables.net/).

Sometimes some of the strings are really long. I'd like to truncate each string to lets say to 75 charachters, which will make the fields more manageable on display.

Is there an easy PHP function to do this or should I just create a double loop like this?

foreach ($fulltable as $row) {
    foreach ($row as $field) {
        // TRUNCATE FIELD HERE
    }  
}

Answer 1

You could use array_walk_recursive() to do this and take the value by reference, e.g.

array_walk_recursive($arr, function(&$v){
    $v = substr($v, 0, 75);
});