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<?php |
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namespace WebPConvert\Convert\Converters\BaseTraits; |
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/** |
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* Trait for handling warnings (by logging them) |
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* |
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* This trait is currently only used in the AbstractConverter class. It has been extracted into a |
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* trait in order to bundle the methods concerning options. |
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* |
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* @package WebPConvert |
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* @author Bjørn Rosell <[email protected]> |
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* @since Class available since Release 2.0.0 |
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*/ |
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trait WarningLoggerTrait |
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{ |
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abstract protected function logLn($msg, $style = ''); |
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/** @var string|array|null Previous error handler (stored in order to be able pass warnings on) */ |
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private $previousErrorHandler; |
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/** |
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* Handle warnings and notices during conversion by logging them and passing them on. |
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* |
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* The function is a callback used with "set_error_handler". |
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* It is declared public because it needs to be accessible from the point where the warning happened. |
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* |
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* @param integer $errno |
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* @param string $errstr |
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* @param string $errfile |
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* @param integer $errline |
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* |
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* @return false|null |
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*/ |
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public function warningHandler($errno, $errstr, $errfile, $errline) |
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{ |
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/* |
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We do NOT do the following (even though it is generally recommended): |
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if (!(error_reporting() & $errno)) { |
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// This error code is not included in error_reporting, so let it fall |
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// through to the standard PHP error handler |
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return false; |
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} |
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- Because we want to log all warnings and errors (also the ones that was suppressed with @) |
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https://secure.php.net/manual/en/language.operators.errorcontrol.php |
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*/ |
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$errorTypes = [ |
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E_WARNING => "Warning", |
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E_NOTICE => "Notice", |
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E_STRICT => "Strict Notice", |
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E_DEPRECATED => "Deprecated", |
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E_USER_DEPRECATED => "User Deprecated", |
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/* |
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The following can never be catched by a custom error handler: |
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E_PARSE, E_ERROR, E_CORE_ERROR, E_CORE_WARNING, E_COMPILE_ERROR, E_COMPILE_WARNING |
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We do do not currently trigger the following: |
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E_USER_ERROR, E_USER_WARNING, E_USER_NOTICE |
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But we may want to do that at some point, like this: |
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trigger_error('Your version of Gd is very old', E_USER_WARNING); |
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in that case, remember to add them to this array |
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*/ |
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]; |
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if (isset($errorTypes[$errno])) { |
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$errType = $errorTypes[$errno]; |
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} else { |
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$errType = "Unknown error/warning/notice ($errno)"; |
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} |
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$msg = $errType . ': ' . $errstr . ' in ' . $errfile . ', line ' . $errline . ', PHP ' . PHP_VERSION . |
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' (' . PHP_OS . ')'; |
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$this->logLn($msg); |
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//echo 'previously defined handler:' . print_r($this->previousErrorHandler, true); |
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if (!is_null($this->previousErrorHandler)) { |
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return call_user_func($this->previousErrorHandler, $errno, $errstr, $errfile, $errline); |
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} else { |
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return false; |
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} |
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} |
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/** |
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* Activate warning logger. |
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* |
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* Sets the error handler and stores the previous to our error handler can bubble up warnings |
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* |
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* @return void |
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*/ |
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protected function activateWarningLogger() |
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{ |
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$this->previousErrorHandler = set_error_handler( |
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array($this, "warningHandler"), |
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E_WARNING | E_USER_WARNING | E_NOTICE | E_USER_NOTICE | E_USER_ERROR |
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); |
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} |
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/** |
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* Deactivate warning logger. |
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* |
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* Restores the previous error handler. |
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* |
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* @return void |
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*/ |
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protected function deactivateWarningLogger() |
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{ |
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restore_error_handler(); |
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} |
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} |
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rosell-dk /
webp-convert
