readline_callback_handler_install

(no version information, might be only in CVS)

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

Descrizione

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().

Valori restituiti

Restituisce TRUE in caso di successo, FALSE in caso di fallimento.

Esempi

Esempio 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";
?>

Vedere anche:

readline_callback_handler_remove(), readline_callback_read_char() e stream_select().

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Generated: 2007-01-26 17:56:32