readline_callback_handler_install

Beschreibung

Sets up a readline callback interface then prints prompt and immediately returns. The callback function takes one parameter; the user input returned. Calling this function twice without removing the previous callback interface will automatically and conveniently overwrite the old interface.

The callback feature is useful when combined with stream_select() as it allows interleaving of IO and user input, unlike readline().

Rückgabewerte

Gibt bei Erfolg TRUE zurück, im Fehlerfall FALSE.

Beispiele

Beispiel 1. Readline Callback Interface Example <?php function rl_callback($ret) {     global $c, $prompting;     echo "You entered: $ret\n";     $c++;     if ($c > 10) {         $prompting = false;         readline_callback_handler_remove();     } else {         readline_callback_handler_install("[$c] Enter something: ", 'rl_callback');     } } $c = 1; $prompting = true; readline_callback_handler_install("[$c] Enter something: ", 'rl_callback'); while ($prompting) {     $n = stream_select($r = array(STDIN), $w = null, $e = null, null);     if ($n && in_array(STDIN, $r)) {         // read a character, will call the callback when a newline is entered         readline_callback_read_char();     } } echo "Prompting disabled. All done.\n"; ?>

Siehe auch

readline_callback_handler_remove(), readline_callback_read_char() und stream_select().