/lib/LP/utility.php

<?php
if(!defined('AMP_DEBUG_SQL') ) define('AMP_DEBUG_SQL', isset($_GET['lp_debug']) && $_GET['lp_debug']);

function bail($msg = ''){
	if(is_array($msg)) $msg = array_dump($msg);
	$html = '';
	$html .= '
				<h2 style="margin-bottom:2px;">ERROR MESSAGE</h2>'.$msg.'<br>
				<h2 style="margin-bottom:6px;">BACKTRACE</h2>
				'.backtrace().'
				';

	echo $html;
	trigger_error(strip_tags($msg));
	exit();
}

function backtrace(){
    $trace = debug_backtrace();
    array_shift($trace);
    $html = '';
    foreach( $trace as $t){
    		$file = 'FILE: '.$t['file'];
    		$line = 'LINE: '.$t['line'];

            isset($t['class'])	?  $function = $t['class'].'->'.$t['function']
								:  $function = $t['function'];
			$function = 'FUNCTION: '. $function;		

            $html .= "
            			$file <br>
            			$line <br>
            			$function <br><br>
            		 ";			
    }
    return $html;
}

class AMP {

  static function array_filter_by_keys( $filter, $data){
    if(!$data) return array();
		$filtered_array = array_intersect_key( $data, array_flip($filter)); 
    return $filtered_array ? $filtered_array
                           : array();
  } 
  
  static function camelcase( $value ) {
      return str_replace( ' ', '', ucwords( str_replace( '_', ' ', $value )));
  }

  static function get_column_names( $db, $table_name ) {
    static $table_defs;
    if (isset($table_defs[$table_name] )) return $table_defs[$table_name];
    $table_defs[$table_name] = $db->MetaColumnNames($table_name);
    return $table_defs[$table_name];
  }
  
  static function debug_sql( $sql_statement, $source_object = 'sql' ) {
    if(!AMP_DEBUG_SQL) return;
    print $source_object . ":<BR>\n". $sql_statement . "<P>";
    trigger_error( $source_object . " debug: ". $sql_statement );
  }

}