--- /dev/null
+<?php
+
+namespace Drupal\Component\Utility;
+
+/**
+ * Provides helpers for dealing with variables.
+ *
+ * @ingroup utility
+ */
+class Variable {
+
+ /**
+ * Drupal-friendly var_export().
+ *
+ * @param mixed $var
+ * The variable to export.
+ * @param string $prefix
+ * A prefix that will be added at the beginning of every lines of the output.
+ *
+ * @return string
+ * The variable exported in a way compatible to Drupal's coding standards.
+ */
+ public static function export($var, $prefix = '') {
+ if (is_array($var)) {
+ if (empty($var)) {
+ $output = 'array()';
+ }
+ else {
+ $output = "array(\n";
+ // Don't export keys if the array is non associative.
+ $export_keys = array_values($var) != $var;
+ foreach ($var as $key => $value) {
+ $output .= ' ' . ($export_keys ? static::export($key) . ' => ' : '') . static::export($value, ' ', FALSE) . ",\n";
+ }
+ $output .= ')';
+ }
+ }
+ elseif (is_bool($var)) {
+ $output = $var ? 'TRUE' : 'FALSE';
+ }
+ elseif (is_string($var)) {
+ if (strpos($var, "\n") !== FALSE || strpos($var, "'") !== FALSE) {
+ // If the string contains a line break or a single quote, use the
+ // double quote export mode. Encode backslash, dollar symbols, and
+ // double quotes and transform some common control characters.
+ $var = str_replace(['\\', '$', '"', "\n", "\r", "\t"], ['\\\\', '\$', '\"', '\n', '\r', '\t'], $var);
+ $output = '"' . $var . '"';
+ }
+ else {
+ $output = "'" . $var . "'";
+ }
+ }
+ elseif (is_object($var) && get_class($var) === 'stdClass') {
+ // var_export() will export stdClass objects using an undefined
+ // magic method __set_state() leaving the export broken. This
+ // workaround avoids this by casting the object as an array for
+ // export and casting it back to an object when evaluated.
+ $output = '(object) ' . static::export((array) $var, $prefix);
+ }
+ else {
+ $output = var_export($var, TRUE);
+ }
+
+ if ($prefix) {
+ $output = str_replace("\n", "\n$prefix", $output);
+ }
+
+ return $output;
+ }
+
+}