Question

why would this

$trader_details = array_walk($trader_details, 'htmlspecialchars');

give this error?

Severity: Warning
Message: htmlspecialchars() expects parameter 2 to be long, string given

afaik htmlspecialchars only has optional parameters apart from the input string? this running in codeigniter

thx

Answer 1

The callback function passed to array_walk expects the second parameter to be the key of the array element:

Typically, funcname takes on two parameters. The array parameter’s value being the first, and the key/index second.

But htmlspecialchars expects the second parameter to be the quoting style (typically specified by one of the ENT_* constants of the type integer).

Try array_map instead. It just uses the array’s values.