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  • libxml_get_errors()

    (PHP 5 >= 5.1.0, PHP 7)

    Retrieve array of errors

    说明

    libxml_get_errors(void): array

    Retrieve array of errors.

    返回值

    Returns an array with LibXMLError objects if there are any errors in the buffer, or an empty array otherwise.

    范例

    Example #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);
    $xml = explode("\n", $xmlstr);
    if ($doc === false) {
        $errors = libxml_get_errors();
        foreach ($errors as $error) {
            echo display_xml_error($error, $xml);
        }
        libxml_clear_errors();
    }
    function display_xml_error($error, $xml)
    {
        $return  = $xml[$error->line - 1] . "\n";
        $return .= str_repeat('-', $error->column) . "^\n";
        switch ($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\n--------------------------------------------\n\n";
    }
    ?>
    

    以上例程会输出:

      <titles>PHP: Behind the Parser</title>
    ----------------------------------------------^
    Fatal Error 76: Opening and ending tag mismatch: titles line 4 and title
      Line: 4
      Column: 46
    --------------------------------------------
    

    参见

    Please beware that the column property seems almost always to be invalid. I thought it only occurred when the line in question was long (and I was just about to submit a bug report with an example), however, at the time of posting, you can even see the problem in the example provided on this page: line 4 does not even have 46 characters. Where the XML line is long, the difference can be very large.
    This property comes from the libxml extension, so in any case I don't think this is a PHP bug, however it is worth knowing that the value might be totally unreliable to save some confusion.
    The PHP documentation page for the libXMLError class gives some indication, stating:
    "This property isn't entirely implemented in libxml and therefore 0 is often returned."
    (My libxml version: 2.9.1)