- strtr: documentation ( source)
- print_r: documentation ( source)
- var_export: documentation ( source)
- str_replace: documentation ( source)
- explode: documentation ( source)
<?php
var_export(strtr('pehrova@gymnacel.cz, nosek@gymnacel.cz', " \t\r\n,", ';'));
var_export(explode(';', str_replace([ " ", "\t", "\r", "\n", "," ], ';', 'pehrova@gymnacel.cz, nosek@gymnacel.cz')));
print_r("," === ",");