(PHP 7)
IntlChar::isISOControl — Check if code point is an ISO control code
Determines whether the specified code point is an ISO control code.
TRUE for U+0000..U+001f and U+007f..U+009f (general category "Cc").
Returns TRUE if
codepoint is an ISO control code, FALSE if not.
Exemplo #1 Testando codepoints diferentes
<?php
var_dump(IntlChar::isISOControl(" "));
var_dump(IntlChar::isISOControl("\n"));
var_dump(IntlChar::isISOControl("\u{200e}"));
?>
O exemplo acima irá imprimir:
bool(false) bool(true) bool(false)