| 1 | <?php |
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| 2 | /** |
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| 3 | * Replace function is_callable() |
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| 4 | * |
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| 5 | * @category PHP |
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| 6 | * @package PHP_Compat |
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| 7 | * @link http://php.net/function.is_callable |
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| 8 | * @author Gaetano Giunta <giunta.gaetano@sea-aeroportimilano.it> |
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| 9 | * @version $Id: is_callable.php,v 1.3 2006/08/21 14:03:15 ggiunta Exp $ |
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| 10 | * @since PHP 4.0.6 |
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| 11 | * @require PHP 4.0.0 (true, false, etc...) |
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| 12 | * @todo add the 3rd parameter syntax... |
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| 13 | */ |
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| 14 | if (!function_exists('is_callable')) { |
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| 15 | function is_callable($var, $syntax_only=false) |
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| 16 | { |
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| 17 | if ($syntax_only) |
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| 18 | { |
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| 19 | /* from The Manual: |
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| 20 | * If the syntax_only argument is TRUE the function only verifies |
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| 21 | * that var might be a function or method. It will only reject simple |
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| 22 | * variables that are not strings, or an array that does not have a |
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| 23 | * valid structure to be used as a callback. The valid ones are |
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| 24 | * supposed to have only 2 entries, the first of which is an object |
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| 25 | * or a string, and the second a string |
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| 26 | */ |
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| 27 | return (is_string($var) || (is_array($var) && count($var) == 2 && is_string(end($var)) && (is_string(reset($var)) || is_object(reset($var))))); |
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| 28 | } |
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| 29 | else |
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| 30 | { |
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| 31 | if (is_string($var)) |
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| 32 | { |
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| 33 | return function_exists($var); |
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| 34 | } |
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| 35 | else if (is_array($var) && count($var) == 2 && is_string($method = end($var))) |
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| 36 | { |
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| 37 | $obj = reset($var); |
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| 38 | if (is_string($obj)) |
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| 39 | { |
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| 40 | $methods = get_class_methods($obj); |
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| 41 | return (bool)(is_array($methods) && in_array(strtolower($method), $methods)); |
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| 42 | } |
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| 43 | else if (is_object($obj)) |
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| 44 | { |
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| 45 | return method_exists($obj, $method); |
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| 46 | } |
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| 47 | } |
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| 48 | return false; |
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| 49 | } |
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| 50 | } |
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| 51 | } |
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| 52 | |
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| 53 | ?> |
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