Disable warnings when loading non-well-formed HTML by DomDocument (PHP)

Get your ducks in a row: Organizing error handling in libxml

Facing a rowdy crowd of non-well-formed HTML? Keep cool by fortifying your castle with robust error handling using libxml. First, switch on libxml_use_internal_errors(true) to mute warnings. After the parsing party, summon libxml_get_errors() to investigate any party fouls during the HTML load.

Post-party cleanup: Processing errors

Who cleans up after a big party? You do! After the HTML loading, get your broom (aka libxml_get_errors()) and start sweeping:

$errors = libxml_get_errors();
foreach ($errors as error) {
    // If errors were roaches, this would be your bug spray!
}
libxml_clear_errors(); // Just like erasing any evidence of previous party!
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Enabling time travel: State restoration

Once your DOM operation fiesta ends, you must restore order in the jungle with libxml_use_internal_errors(false). This command is your magic portal that brings back the previous error-handling state:

$previous_state = libxml_use_internal_errors(true);
// Load the HTML, juggle errors, yada yada...
libxml_use_internal_errors($previous_state);  // Revert to the previous state, like nothing happened!
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Errare humanum est: Embrace advanced error management

To err is human, to handle errors efficiently is divine. Consider wrapping your accident management in a neat class packaging with discrete methods to capture, retrieve, and reset errors.

Making sense of errors: Advanced practices

Turning off the error alarm is merely the first step. Here are some bonus tips to sail through the HTML processing storm:

Calling the shots: Custom error handling

Trust your instincts and create your custom error handler:

set_error_handler('myCoolErrorHandler');   // Like a personal bodyguard for your errors!
// Load the HTML
restore_error_handler();   // Don't forget to tell your bodyguard when to stop!
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To ensure your app's usual error handling routine continues untouched, never forget to restore the previous error handler.

Armour up with try-catch blocks

Suit up your load calls with try-catch blocks to block the advance of DOMExceptions:

try {
    $dom->loadHTML($html, LIBXML_NOWARNING | LIBXML_NOERROR);
} catch (DOMException $e) {
    // Every exception caught is a crisis averted!
}
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Keeping the environment clean

Always remember to preserve and restore the error handling state to prevent your changes from spilling into other parts of your app - think of it as practicing good coding hygiene!