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)
libxml_get_errors
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
libxml_get_errors — Retrieve array of errors
Description
libxml_get_errors(): array
Retrieve array of errors.
Parameters
This function has no parameters.
Return Values
Returns an array with LibXMLError objects if there are any errors in the buffer, or an empty array otherwise.
Examples
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";
}
?>
The above example will output:
<titles>PHP: Behind the Parser</title> ----------------------------------------------^ Fatal Error 76: Opening and ending tag mismatch: titles line 4 and title Line: 4 Column: 46 --------------------------------------------
See Also
- libxml_get_last_error() - Retrieve last error from libxml
- libxml_clear_errors() - Clear libxml error buffer
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User Contributed Notes 2 notes
lech ¶
6 years ago
