Text_Diff::_check │ public │ WP 1.0

Checks a diff for validity.

This is here only for debugging purposes.

Method of the class: Text_Diff{}

No Hooks.

Returns

null. Nothing (null).

Usage

$Text_Diff = new Text_Diff();
$Text_Diff->_check( $from_lines, $to_lines );
$from_lines(required)
.
$to_lines(required)
.

Text_Diff::_check() code WP 6.9

wp-includes/Text/Diff.php 
function _check($from_lines, $to_lines)
{
    if (serialize($from_lines) != serialize($this->getOriginal())) {
        throw new Text_Exception("Reconstructed original does not match");
    }
    if (serialize($to_lines) != serialize($this->getFinal())) {
        throw new Text_Exception("Reconstructed final does not match");
    }

    $rev = $this->reverse();
    if (serialize($to_lines) != serialize($rev->getOriginal())) {
        throw new Text_Exception("Reversed original does not match");
    }
    if (serialize($from_lines) != serialize($rev->getFinal())) {
        throw new Text_Exception("Reversed final does not match");
    }

    $prevtype = null;
    foreach ($this->_edits as $edit) {
        if ($prevtype !== null && $edit instanceof $prevtype) {
            throw new Text_Exception("Edit sequence is non-optimal");
        }
        $prevtype = get_class($edit);
    }

    return true;
}