include/dba.php

   1 <?php
   2
   3 // MySQL database class
   4 //
   5 // For debugging, insert 'dbg(x);' anywhere in the program flow.
   6 // x = 1: display db success/failure following content
   7 // x = 2: display full queries following content
   8 // x = 3: display full queries using echo; which will mess up display
   9 //        really bad but will return output in stubborn cases.
  10
  11 if(! class_exists('dba')) {
  12 class dba {
  13
  14         private $debug = 0;
  15         private $db;
  16
  17         function __construct($server,$user,$pass,$db,$install = false) {
  18                 $this->db = @new mysqli($server,$user,$pass,$db);
  19                 if((mysqli_connect_errno()) && (! install))
  20                         system_unavailable();
  21         }
  22
  23         public function getdb() {
  24                 return $this->db;
  25         }
  26
  27         public function q($sql) {
  28                 global $debug_text;
  29
  30                 if(! $this->db )
  31                         return false;
  32
  33                 $result = @$this->db->query($sql);
  34
  35                 if($this->debug) {
  36
  37                         $mesg = '';
  38
  39                         if($this->db->errno)
  40                                 $debug_text .=  $this->db->error . EOL;
  41
  42                         if($result === false)
  43                                 $mesg = 'false';
  44                         elseif($result === true)
  45                                 $mesg = 'true';
  46                         else
  47                                 $mesg = $result->num_rows.' results' . EOL;
  48
  49                         $str =  'SQL = ' . printable($sql) . EOL . 'SQL returned ' . $mesg . EOL;
  50
  51                         switch($this->debug) {
  52                                 case 3:
  53                                         echo $str;
  54                                         break;
  55                                 default:
  56                                         $debug_text .= $str;
  57                                         break;
  58                         }
  59                 }
  60                 else {
  61                         if($result === false) {
  62                                 logger('dba: ' . printable($sql) . ' returned false.');
  63                                 if(file_exists('dbfail.out'))
  64                                         file_put_contents('dbfail.out', printable($sql) . ' returned false' . "\n", FILE_APPEND);
  65                         }
  66                 }
  67
  68                 if(($result === true) || ($result === false))
  69                         return $result;
  70
  71                 $r = array();
  72                 if($result->num_rows) {
  73                         while($x = $result->fetch_array(MYSQL_ASSOC))
  74                                 $r[] = $x;
  75                         $result->free_result();
  76                 }
  77
  78                 if($this->debug == 2)
  79                         $debug_text .= printable(print_r($r, true). EOL);
  80                 elseif($this->debug == 3)
  81                         echo printable(print_r($r, true) . EOL) ;
  82
  83                 return($r);
  84         }
  85
  86         public function dbg($dbg) {
  87                 $this->debug = $dbg;
  88         }
  89
  90         public function escape($str) {
  91                 return @$this->db->real_escape_string($str);
  92         }
  93
  94         function __destruct() {
  95                 @$this->db->close();
  96         }
  97 }}
  98
  99 if(! function_exists('printable')) {
 100 function printable($s) {
 101         $s = preg_replace("~([\x01-\x08\x0E-\x0F\x10-\x1F\x7F-\xFF])~",".", $s);
 102         $s = str_replace("\x00",'.',$s);
 103         if(x($_SERVER,'SERVER_NAME'))
 104                 $s = escape_tags($s);
 105         return $s;
 106 }}
 107
 108 // Procedural functions
 109 if(! function_exists('dbg')) {
 110 function dbg($state) {
 111         global $db;
 112         $db->dbg($state);
 113 }}
 114
 115 if(! function_exists('dbesc')) {
 116 function dbesc($str) {
 117         global $db;
 118         return($db->escape($str));
 119 }}
 120
 121
 122 // Function: q($sql,$args);
 123 // Description: execute SQL query with printf style args.
 124 // Example: $r = q("SELECT * FROM `%s` WHERE `uid` = %d",
 125 //                   'user', 1);
 126
 127 if(! function_exists('q')) {
 128 function q($sql) {
 129
 130         global $db;
 131         $args = func_get_args();
 132         unset($args[0]);
 133         $ret = $db->q(vsprintf($sql,$args));
 134         return $ret;
 135 }}
 136
 137
 138 // Caller is responsible for ensuring that any integer arguments to
 139 // dbesc_array are actually integers and not malformed strings containing
 140 // SQL injection vectors. All integer array elements should be specifically
 141 // cast to int to avoid trouble.
 142
 143
 144 if(! function_exists('dbesc_array_cb')) {
 145 function dbesc_array_cb(&$item, $key) {
 146         if(is_string($item))
 147                 $item = dbesc($item);
 148 }}
 149
 150
 151 if(! function_exists('dbesc_array')) {
 152 function dbesc_array(&$arr) {
 153         if(is_array($arr) && count($arr)) {
 154                 array_walk($arr,'dbesc_array_cb');
 155         }
 156 }}