readline_callback_handler_install

(PHP 5 >= 5.1.0RC1)

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

Leírás

bool readline_callback_handler_install ( string prompt, callback callback )

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().

Visszatérési értékek

Siker esetén TRUE értékkel tér vissza, ellenkező esetben FALSE értéket ad.

Példák

Példa 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";
?>

Lásd még

readline_callback_handler_remove(), readline_callback_read_char() és stream_select().