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readline_callback_handler_install

readline_callback_handler_install

Initializes the readline callback interface and terminal, prints the prompt and returns immediately

true **readline_callback_handler_install** string $prompt callable $callback

Sets up a readline callback interface then prints and immediately returns. Calling this function twice without removing the previous callback interface will automatically and conveniently overwrite the old interface. prompt

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

promptThe prompt message.

callback The function takes one parameter; the user input returned. callback

return.true.always

Voorbeeld: 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) {
    $w = NULL;
    $e = NULL;
    $n = stream_select($r = array(STDIN), $w, $e, null);
    if ($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";
?>

readline_callback_handler_remove``readline_callback_read_char``stream_select

Vorige ← readline_add_history Volgende readline_callback_handler_remove →

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