The output of this method is similar to the output of print_r(), but
improved in various aspects:
- NULL is rendered as "null" (instead of "")
- TRUE is rendered as "true" (instead of "1")
- FALSE is rendered as "false" (instead of "")
- Strings are always quoted with single quotes
- Carriage returns and newlines are normalized to \n
- Recursion and repeated rendering is treated properly
/**
* Stringifies any provided value.
*
* @param mixed $value
* @param boolean $exportObject
*
* @return string
*/
public function stringify($value, $exportObject = true)
{
if (is_array($value)) {
if (range(0, count($value) - 1) === array_keys($value)) {
return '[' . implode(', ', array_map(array($this, __FUNCTION__), $value)) . ']';
}
$stringify = array($this, __FUNCTION__);
return '[' . implode(', ', array_map(function ($item, $key) use($stringify) {
return (is_integer($key) ? $key : '"' . $key . '"') . ' => ' . call_user_func($stringify, $item);
}, $value, array_keys($value))) . ']';
}
if (is_resource($value)) {
return get_resource_type($value) . ':' . $value;
}
if (is_object($value)) {
return $exportObject ? ExportUtil::export($value) : sprintf('%s:%s', get_class($value), spl_object_hash($value));
}
if (true === $value || false === $value) {
return $value ? 'true' : 'false';
}
if (is_string($value)) {
$str = sprintf('"%s"', str_replace("\n", '\\n', $value));
if (50 <= strlen($str)) {
return substr($str, 0, 50) . '"...';
}
return $str;
}
if (null === $value) {
return 'null';
}
return (string) $value;
}
