/**
* Prints out debug information about given variable.
*
* Only runs if debug level is greater than zero.
*
* @param mixed $var Variable to show debug information for.
* @param bool $showHtml If set to true, the method prints the debug data in a browser-friendly way.
* @param bool $showFrom If set to true, the method prints from where the function was called.
* @return void
* @link http://book.cakephp.org/2.0/en/development/debugging.html#basic-debugging
* @link http://book.cakephp.org/2.0/en/core-libraries/global-constants-and-functions.html#debug
*/
function debug($var, $showHtml = null, $showFrom = true)
{
if (Configure::read('debug')) {
$file = '';
$line = '';
$lineInfo = '';
if ($showFrom) {
$trace = Debugger::trace(array('start' => 1, 'depth' => 2, 'format' => 'array'));
$file = str_replace(array(CAKE_CORE_INCLUDE_PATH, ROOT), '', $trace[0]['file']);
$line = $trace[0]['line'];
}
$html = <<<HTML
<div class="cake-debug-output">
%s
<pre class="cake-debug">
%s
</pre>
</div>
HTML;
$text = <<<TEXT
%s
########## DEBUG ##########
%s
###########################
TEXT;
$template = $html;
if (php_sapi_name() === 'cli' || $showHtml === false) {
$template = $text;
if ($showFrom) {
$lineInfo = sprintf('%s (line %s)', $file, $line);
}
}
if ($showHtml === null && $template !== $text) {
$showHtml = true;
}
$var = Debugger::exportVar($var, 25);
if ($showHtml) {
$template = $html;
$var = h($var);
if ($showFrom) {
$lineInfo = sprintf('<span><strong>%s</strong> (line <strong>%s</strong>)</span>', $file, $line);
}
}
printf($template, $lineInfo, $var);
}
}
/**
* Outputs a stack trace based on the supplied options.
*
* ### Options
*
* - `depth` - The number of stack frames to return. Defaults to 999
* - `format` - The format you want the return. Defaults to the currently selected format. If
* format is 'array' or 'points' the return will be an array.
* - `args` - Should arguments for functions be shown? If true, the arguments for each method call
* will be displayed.
* - `start` - The stack frame to start generating a trace from. Defaults to 0
*
* @param array $options Format for outputting stack trace
* @return mixed Formatted stack trace
* @link http://book.cakephp.org/2.0/en/development/debugging.html#Debugger::trace
*/
public static function trace(array $options = array())
{
$self = Debugger::getInstance();
$defaults = array('depth' => 999, 'format' => $self->_outputFormat, 'args' => false, 'start' => 0, 'scope' => null, 'exclude' => array('call_user_func_array', 'trigger_error'));
$options = Hash::merge($defaults, $options);
$backtrace = debug_backtrace();
$count = count($backtrace);
$back = array();
$_trace = array('line' => '??', 'file' => '[internal]', 'class' => null, 'function' => '[main]');
for ($i = $options['start']; $i < $count && $i < $options['depth']; $i++) {
$trace = array_merge(array('file' => '[internal]', 'line' => '??'), $backtrace[$i]);
$signature = $reference = '[main]';
if (isset($backtrace[$i + 1])) {
$next = array_merge($_trace, $backtrace[$i + 1]);
$signature = $reference = $next['function'];
if (!empty($next['class'])) {
$signature = $next['class'] . '::' . $next['function'];
$reference = $signature . '(';
if ($options['args'] && isset($next['args'])) {
$args = array();
foreach ($next['args'] as $arg) {
$args[] = Debugger::exportVar($arg);
}
$reference .= implode(', ', $args);
}
$reference .= ')';
}
}
if (in_array($signature, $options['exclude'])) {
continue;
}
if ($options['format'] === 'points' && $trace['file'] !== '[internal]') {
$back[] = array('file' => $trace['file'], 'line' => $trace['line']);
} elseif ($options['format'] === 'array') {
$back[] = $trace;
} else {
if (isset($self->_templates[$options['format']]['traceLine'])) {
$tpl = $self->_templates[$options['format']]['traceLine'];
} else {
$tpl = $self->_templates['base']['traceLine'];
}
$trace['path'] = static::trimPath($trace['file']);
$trace['reference'] = $reference;
unset($trace['object'], $trace['args']);
$back[] = String::insert($tpl, $trace, array('before' => '{:', 'after' => '}'));
}
}
if ($options['format'] === 'array' || $options['format'] === 'points') {
return $back;
}
return implode("\n", $back);
}
/**
* Tests that __debugInfo is used when available
*
* @return void
*/
public function testDebugInfo()
{
$object = new DebuggableThing();
$result = Debugger::exportVar($object, 2);
$expected = <<<eos
object(Cake\\Test\\TestCase\\Utility\\DebuggableThing) {
\t'foo' => 'bar',
\t'inner' => object(Cake\\Test\\TestCase\\Utility\\DebuggableThing) {
\t\t[maximum depth reached]
\t
\t}
}
eos;
$this->assertEquals($expected, $result);
}
