例子 1. A libxml_get_errors() example
     This example demonstrates how to build a simple libxml error handler.
    
<?php
  libxml_use_internal_errors(true);
  $xmlstr = <<< XML <?xml version='1.0' standalone='yes'?> <movies>  <movie>   <titles>PHP: Behind the Parser</title>  </movie> </movies> XML;
  $doc = simplexml_load_string($xmlstr);
  if (!$doc) {     $errors = libxml_get_errors();
      foreach ($errors as $error) {         echo display_xml_error($error);     }
      libxml_clear_errors(); }
 
  function display_xml_error($error) {
      switch ($error->level) {         case LIBXML_ERR_WARNING:             $return = "Warning $error->code: ";             break;          case LIBXML_ERR_ERROR:             $return = "Error $error->code: ";             break;         case LIBXML_ERR_FATAL:             $return = "Fatal Error $error->code: ";             break;     }
      $return .= trim($error->message) .                "\n  Line: $error->line" .                "\n  Column: $error->column";
      if ($error->file) {         $return .= "\n  File: $error->file";     }
      return "$return\n"; }
  ?>
 | 
上例将输出:
Fatal Error 76: Opening and ending tag mismatch: titles line 4 and title
  Line: 4
  Column: 0  |