<?php
/*
* This file is part of the Exporter package.
*
* (c) Sebastian Bergmann <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace SebastianBergmann\Exporter;
use SebastianBergmann\RecursionContext\Context;
/**
* A nifty utility for visualizing PHP variables.
*
* <code>
* <?php
* use SebastianBergmann\Exporter\Exporter;
*
* $exporter = new Exporter;
* print $exporter->export(new Exception);
* </code>
*/
class Exporter
{
/**
* Exports a value as a string
*
* 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
*
* @param mixed $value
* @param int $indentation The indentation level of the 2nd+ line
* @return string
*/
public function export($value, $indentation = 0)
{
return $this->recursiveExport($value, $indentation);
}
/**
* @param mixed $data
* @param Context $context
* @return string
*/
public function shortenedRecursiveExport(&$data, Context $context = null)
{
$result = array();
$exporter = new self();
if (!$context) {
$context = new Context;
}
$array = $data;
$context->add($data);
foreach ($array as $key => $value) {
if (is_array($value)) {
if ($context->contains($data[$key]) !== false) {
$result[] = '*RECURSION*';
}
else {
$result[] = sprintf(
'array(%s)',
$this->shortenedRecursiveExport($data[$key], $context)
);
}
}
else {
$result[] = $exporter->shortenedExport($value);
}
}
return implode(', ', $result);
}
/**
* Exports a value into a single-line string
*
* The output of this method is similar to the output of
* SebastianBergmann\Exporter\Exporter::export().
*
* Newlines are replaced by the visible string '\n'.
* Contents of arrays and objects (if any) are replaced by '...'.
*
* @param mixed $value
* @return string
* @see SebastianBergmann\Exporter\Exporter::export
*/
public function shortenedExport($value)
{
if (is_string($value)) {
$string = $this->export($value);
if (function_exists('mb_strlen')) {
if (mb_strlen($string) > 40) {
$string = mb_substr($string, 0, 30) . '...' . mb_substr($string, -7);
}
} else {
if (strlen($string) > 40) {
$string = substr($string, 0, 30) . '...' . substr($string, -7);
}
}
return str_replace("\n", '\n', $string);
}
if (is_object($value)) {
return sprintf(
'%s Object (%s)',
get_class($value),
count($this->toArray($value)) > 0 ? '...' : ''
);
}
if (is_array($value)) {
return sprintf(
'Array (%s)',
count($value) > 0 ? '...' : ''
);
}
return $this->export($value);
}
/**
* Converts an object to an array containing all of its private, protected
* and public properties.
*
* @param mixed $value
* @return array
*/
public function toArray($value)
{
if (!is_object($value)) {
return (array) $value;
}
$array = array();
foreach ((array) $value as $key => $val) {
// properties are transformed to keys in the following way:
// private $property => "\0Classname\0property"
// protected $property => "\0*\0property"
// public $property => "property"
if (preg_match('/^\0.+\0(.+)$/', $key, $matches)) {
$key = $matches[1];
}
// See https://github.com/php/php-src/commit/5721132
if ($key === "\0gcdata") {
continue;
}
$array[$key] = $val;
}
// Some internal classes like SplObjectStorage don't work with the
// above (fast) mechanism nor with reflection in Zend.
// Format the output similarly to print_r() in this case
if ($value instanceof \SplObjectStorage) {
// However, the fast method does work in HHVM, and exposes the
// internal implementation. Hide it again.
if (property_exists('\SplObjectStorage', '__storage')) {
unset($array['__storage']);
} elseif (property_exists('\SplObjectStorage', 'storage')) {
unset($array['storage']);
}
if (property_exists('\SplObjectStorage', '__key')) {
unset($array['__key']);
}
foreach ($value as $key => $val) {
$array[spl_object_hash($val)] = array(
'obj' => $val,
'inf' => $value->getInfo(),
);
}
}
return $array;
}
/**
* Recursive implementation of export
*
* @param mixed $value The value to export
* @param int $indentation The indentation level of the 2nd+ line
* @param \SebastianBergmann\RecursionContext\Context $processed Previously processed objects
* @return string
* @see SebastianBergmann\Exporter\Exporter::export
*/
protected function recursiveExport(&$value, $indentation, $processed = null)
{
if ($value === null) {
return 'null';
}
if ($value === true) {
return 'true';
}
if ($value === false) {
return 'false';
}
if (is_float($value) && floatval(intval($value)) === $value) {
return "$value.0";
}
if (is_resource($value)) {
return sprintf(
'resource(%d) of type (%s)',
$value,
get_resource_type($value)
);
}
if (is_string($value)) {
// Match for most non printable chars somewhat taking multibyte chars into account
if (preg_match('/[^\x09-\x0d\x1b\x20-\xff]/', $value)) {
return 'Binary String: 0x' . bin2hex($value);
}
return "'" .
str_replace(array("\r\n", "\n\r", "\r"), array("\n", "\n", "\n"), $value) .
"'";
}
$whitespace = str_repeat(' ', 4 * $indentation);
if (!$processed) {
$processed = new Context;
}
if (is_array($value)) {
if (($key = $processed->contains($value)) !== false) {
return 'Array &' . $key;
}
$array = $value;
$key = $processed->add($value);
$values = '';
if (count($array) > 0) {
foreach ($array as $k => $v) {
$values .= sprintf(
'%s %s => %s' . "\n",
$whitespace,
$this->recursiveExport($k, $indentation),
$this->recursiveExport($value[$k], $indentation + 1, $processed)
);
}
$values = "\n" . $values . $whitespace;
}
return sprintf('Array &%s (%s)', $key, $values);
}
if (is_object($value)) {
$class = get_class($value);
if ($hash = $processed->contains($value)) {
return sprintf('%s Object &%s', $class, $hash);
}
$hash = $processed->add($value);
$values = '';
$array = $this->toArray($value);
if (count($array) > 0) {
foreach ($array as $k => $v) {
$values .= sprintf(
'%s %s => %s' . "\n",
$whitespace,
$this->recursiveExport($k, $indentation),
$this->recursiveExport($v, $indentation + 1, $processed)
);
}
$values = "\n" . $values . $whitespace;
}
return sprintf('%s Object &%s (%s)', $class, $hash, $values);
}
return var_export($value, true);
}
}
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