function Kint::_showSource

* trace helper, shows the place in code inline * *

Parameters

string $file full path to file: * @param int $lineNumber the line to display * @param int $padding surrounding lines to show besides the main one * * @return bool|string

File

kint/kint/Kint.class.php, line 322

Class

Kint

Code

private static function _showSource($file, $lineNumber, $padding = 7) {
    if (!$file or !is_readable($file)) {
        
        # continuing will cause errors
        return false;
    }
    
    # open the file and set the line position
    $file = fopen($file, 'r');
    $line = 0;
    
    # Set the reading range
    $range = array(
        'start' => $lineNumber - $padding,
        'end' => $lineNumber + $padding,
    );
    
    # set the zero-padding amount for line numbers
    $format = '% ' . strlen($range['end']) . 'd';
    $source = '';
    while (($row = fgets($file)) !== false) {
        
        # increment the line number
        if (++$line > $range['end']) {
            break;
        }
        if ($line >= $range['start']) {
            
            # make the row safe for output
            $row = htmlspecialchars($row, ENT_NOQUOTES, 'UTF-8');
            
            # trim whitespace and sanitize the row
            $row = '<span>' . sprintf($format, $line) . '</span> ' . $row;
            if ($line === $lineNumber) {
                
                # apply highlighting to this row
                $row = '<div class="kint-highlight">' . $row . '</div>';
            }
            else {
                $row = '<div>' . $row . '</div>';
            }
            
            # add to the captured source
            $source .= $row;
        }
    }
    
    # close the file
    fclose($file);
    return $source;
}