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<?php |
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namespace MVC; |
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class Exception extends \Exception |
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{ |
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// Redefine the exception so message isn't optional |
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public function __construct($message, $code = 0, Exception $previous = null) |
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{ |
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// some code |
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// make sure everything is assigned properly |
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parent::__construct($this->generateCallTrace(), $code, $previous); |
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} |
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// custom string representation of object |
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public function __toString() |
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{ |
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return __CLASS__ . ": [{$this->code}]: {$this->message}\n"; |
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} |
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public function generateCallTrace() |
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{ |
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$e = new \Exception(); |
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$trace = explode("\n", $e->getTraceAsString()); |
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// reverse array to make steps line up chronologically |
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$trace = array_reverse($trace); |
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array_shift($trace); // remove {main} |
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array_pop($trace); // remove call to this method |
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$length = count($trace); |
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$result = []; |
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for ($i = 0; $i < $length; ++$i) { |
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$result[] = ($i + 1) . ')' . substr($trace[$i], strpos($trace[$i], ' ')); // replace '#someNum' with '$i)', set the right ordering |
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} |
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return nl2br("\t" . implode("\n\t", $result) . "\n\n" . $this->debug_string_backtrace()); |
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} |
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public function debug_string_backtrace() |
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{ |
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if (ob_get_level()) { |
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ob_get_clean(); |
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} |
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ob_start(); |
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echo "debug_print_backtrace:\n\n "; |
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debug_print_backtrace(); |
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echo "\n\n"; |
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if ($this->is_admin() || isset($_REQUEST['dbg'])) { |
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echo "debug_backtrace (administrator only): \n\n "; |
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echo '<pre>'; |
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var_dump(debug_backtrace()); |
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echo '</pre>'; |
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} |
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$trace = ob_get_contents(); |
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ob_end_clean(); |
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// Remove first item from backtrace as it's this function which |
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// is redundant. |
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//$trace = preg_replace('/^#0\s+' . __FUNCTION__ . "[^\n]*\n/", '', $trace, 1); |
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// Renumber backtrace items. |
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//$trace = preg_replace('/^#(\d+)/me', '\'#\' . ($1 - 1)', $trace); |
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return $trace; |
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} |
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public function is_admin() |
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{ |
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return is_admin(); |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
integer
values, zero is a special case, in particular the following results might be unexpected: