Using try Catch get the warning message in php

Question

Possible Duplicate:
PHP Catching a SimpleXMLElement parse error

I am using xml file for file upload. I have use simplexml_load_file("files/sample.xml"); If given xml file error means, it will show warning like this,

Warning (2): simplexml_load_file() [http://php.net/function.simplexml-load-file]: files/sample.xml:8: parser error : Opening and ending tag mismatch:
Warning (2): simplexml_load_file() [http://php.net/function.simplexml-load-file]:

I have get warning using try catch. I am using cakePHP

Isn't it obvious that this depends on the input file? Show it! Unless the question isn't about the warning. — AndreKR, Oct 17 '12 at 09:04
Here i am using, try{ $xml = simplexml_load_file("files/sample.xml"); } catch (Exception $e){ //$this->set('err_msg',"Invalid XML file"); echo "Invalid"; exit; } — Sundar, Oct 17 '12 at 09:05
That are warnings, not exceptions. You can not "catch" them with a `try {} catch {}` block. — hakre, Oct 17 '12 at 09:06
Then get them: http://www.php.net/manual/en/function.libxml-get-errors.php — hakre, Oct 17 '12 at 09:09

score 1 · Answer 1 · answered Oct 17 '12 at 09:06

1

Your script is loading the file. However, the file cannot be parsed as XML.

To stop warnings being automatically spit out onto the page (it'll do this regardless of whether or not you try/catch), you'll need to use:

libxml_use_internal_errors(true);

Before dealing with any class that uses libxml.

Description from PHP.net:

libxml_use_internal_errors — allows you to disable standard libxml errors and enable user error handling.

answered Oct 17 '12 at 09:06

Wayne Whitty

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By using this libxml_use_internal_errors(true); page display as empty. – Sundar Oct 17 '12 at 09:17
how to pass error message as invalid xml file to user. – Sundar Oct 17 '12 at 09:18

score 1 · Answer 2 · answered Oct 17 '12 at 09:08

If you want to try/catch a warning, you have to 'convert' the warning into a exception.

Set your global error handle like this:

set_error_handler( 'error_handler' );

and then convert the warning to a exception:

function error_handler( $errno, $errmsg, $filename, $linenum, $vars )
  {
    // error was suppressed with the @-operator
    if ( 0 === error_reporting() )
      return false;

    if ( $errno !== E_ERROR )
      throw new \ErrorException( sprintf('%s: %s', $errno, $errmsg ), 0, $errno, $filename, $linenum );

}

A better way would be to use libxml_use_internal_errors(true), which allows you to handle errors yourself. — Wayne Whitty, Oct 17 '12 at 09:11

Using try Catch get the warning message in php

2 Answers2