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July 7, 2018 06:49
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Throwable and Exceptions tree
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<?php | |
if (!function_exists('interface_exists')) { | |
die('PHP version too old'); | |
} | |
$throwables = listThrowableClasses(); | |
$throwablesPerParent = splitInParents($throwables); | |
printTree($throwablesPerParent); | |
if (count($throwablesPerParent) !== 0) { | |
die('ERROR!!!'); | |
} | |
function listThrowableClasses() | |
{ | |
$result = []; | |
if (interface_exists('Throwable')) { | |
foreach(get_declared_classes() as $cn) { | |
$implements = class_implements($cn); | |
if (isset($implements['Throwable'])) { | |
$result[] = $cn; | |
} | |
} | |
} | |
else { | |
foreach(get_declared_classes() as $cn) { | |
if ($cn === 'Exception' || is_subclass_of($cn, 'Exception')) { | |
$result[] = $cn; | |
} | |
} | |
} | |
return $result; | |
} | |
function splitInParents($classes) | |
{ | |
$result = []; | |
foreach($classes as $cn) { | |
$parent = (string)get_parent_class($cn); | |
if (isset($result[$parent])) { | |
$result[$parent][] = $cn; | |
} | |
else { | |
$result[$parent] = [$cn]; | |
} | |
} | |
return $result; | |
} | |
function printTree(&$tree) | |
{ | |
if (!isset($tree[''])) { | |
die('No root classes!!!'); | |
} | |
printLeaves($tree, '', 0); | |
} | |
function printLeaves(&$tree, $parent, $level) | |
{ | |
if (isset($tree[$parent])) { | |
$leaves = $tree[$parent]; | |
unset($tree[$parent]); | |
natcasesort($leaves); | |
$leaves = array_values($leaves); | |
$count = count($leaves); | |
for ($i = 0; $i < $count; ++$i) { | |
$leaf = $leaves[$i]; | |
echo str_repeat(' ', $level) , $leaf, "\n"; | |
printLeaves($tree, $leaf, $level + 1); | |
} | |
} | |
} |
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Here's the output: https://3v4l.org/7fLUP