diff options
Diffstat (limited to 'Moodle/mod/print/compat/is_callable.php')
| -rw-r--r-- | Moodle/mod/print/compat/is_callable.php | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/Moodle/mod/print/compat/is_callable.php b/Moodle/mod/print/compat/is_callable.php new file mode 100644 index 0000000..419697a --- /dev/null +++ b/Moodle/mod/print/compat/is_callable.php @@ -0,0 +1,53 @@ +<?php +/** + * Replace function is_callable() + * + * @category PHP + * @package PHP_Compat + * @link http://php.net/function.is_callable + * @author Gaetano Giunta <giunta.gaetano@sea-aeroportimilano.it> + * @version $Id: is_callable.php 2 2009-03-16 20:22:51Z ggiunta $ + * @since PHP 4.0.6 + * @require PHP 4.0.0 (true, false, etc...) + * @todo add the 3rd parameter syntax... + */ +if (!function_exists('is_callable')) { + function is_callable($var, $syntax_only=false) + { + if ($syntax_only) + { + /* from The Manual: + * If the syntax_only argument is TRUE the function only verifies + * that var might be a function or method. It will only reject simple + * variables that are not strings, or an array that does not have a + * valid structure to be used as a callback. The valid ones are + * supposed to have only 2 entries, the first of which is an object + * or a string, and the second a string + */ + return (is_string($var) || (is_array($var) && count($var) == 2 && is_string(end($var)) && (is_string(reset($var)) || is_object(reset($var))))); + } + else + { + if (is_string($var)) + { + return function_exists($var); + } + else if (is_array($var) && count($var) == 2 && is_string($method = end($var))) + { + $obj = reset($var); + if (is_string($obj)) + { + $methods = get_class_methods($obj); + return (bool)(is_array($methods) && in_array(strtolower($method), $methods)); + } + else if (is_object($obj)) + { + return method_exists($obj, $method); + } + } + return false; + } + } +} + +?>
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