readline_callback_handler_install

(PHP 5 >= 5.1.0)

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

说明

bool readline_callback_handler_install ( string $prompt , callback $callback )

Sets up a readline callback interface then prints prompt and immediately returns. 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().

参数

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

返回值

如果成功则返回 TRUE，失败则返回 FALSE。

范例

Example#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) {
    $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";
?>


	PHP5中文手册 readline_add_history readline_callback_handler_remove Readline PHP Manual readline_callback_handler_install (PHP 5 >= 5.1.0) readline_callback_handler_install — Initializes the readline callback interface and terminal, prints the prompt and returns immediately 说明 bool readline_callback_handler_install ( string `$prompt` , callback `$callback` ) Sets up a readline callback interface then prints `prompt` and immediately returns. 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(). 参数 `prompt` The prompt message. `callback` The `callback` function takes one parameter; the user input returned. 返回值如果成功则返回 `TRUE`，失败则返回 `FALSE`。范例 Example#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) { $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"; ?> 参见 readline_callback_handler_remove() readline_callback_read_char() stream_select() readline_add_history readline_callback_handler_remove Readline PHP Manual

readline_callback_handler_install

说明

参数

返回值

范例

参见