diff core/lib/Drupal/Component/Utility/Variable.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Component/Utility/Variable.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,71 @@
+<?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;
+  }
+
+}