While debugging, it would help if I could exit() and use a foreach to print individual elements of an array. Any ideas?
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5 Answers
If you want to easily print the contents of an array or any other PHP value, use var_dump. Calling exit() is orthogonal to this, and I think it's quite clear to write:
var_dump($arr);
exit(1);
Another technique is to log your output, which is potentially more useful if you don't want to sift through your output HTML to look for the output of var_dump:
error_log(var_export($arr));
exit(1);
Comments
perhaps you could make a debug exit function for debugging with print_r (prints a human-readable version of a variable)
function dexit($array, $status = 0) {
print_r($array);
exit($status);
}
then, anywhere in your code, you could just
dexit($array);
// or
dexit($array, 0);
but it's not difficult to just use the print_r inline either way :)
Comments
Doesn't sound like the most ideal way to debug IMHO, but this could be achieved by using register_shutdown_function():
http://php.net/manual/en/function.register-shutdown-function.php
e.g:
function debug_print_array(){
global $array;
foreach($array as $key => $val){
echo "$key: $val\n";
}
}
register_shutdown_function('debug_print_array');
Comments
Try this, you have two option, debug or var_dump
function debug_exit($array, $type = 1) {
if ($type == 1) { print_r($array); }
if ($type == 2) { var_dump($array); }
exit();
}
Comments
Here is what I use for that, x_r(). The trace comes from this example in PHP docs. The reason for the trace is so you/others can find aprx where/what x_r() is being called via. The exit() is optional if you need to see theme for some reason under the print_r():
// Exits with a print_r and call trace for debugging
if (!function_exists('x_r')) {
function x_r($obj, $exit = true, $return = true) {
// echo the obj first
echo '<pre style="background: #FFFFFF;">', print_r($obj, $return), '</pre>';
// include a debug call trace
$e = new Exception();
$trace = explode("\n", $e->getTraceAsString());
// reverse array to make steps line up chronologically
$trace = array_reverse($trace);
array_shift($trace); // remove {main}
array_pop($trace); // remove call to this method
$length = count($trace);
$result = array();
for ($i = 0; $i < $length; $i++) {
$result[] = ($i + 1) . ')' . substr($trace[$i], strpos($trace[$i], ' ')); // replace '#someNum' with '$i)', set the right ordering
}
// echo call trace
echo '<pre style="background: #FFFFFF;">', print_r($result, $return), '</pre>';
if ($exit === true) {
exit();
}
}
}
Here is the Gist: https://gist.github.com/dhaupin/d9d48328dbe312f6c0de
