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->mysqli->errno)
  40                                 $debug_text .=  $this->db->mysqli->error . EOL;
  41
  42                         if($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) && (file_exists('dbfail.out')))
  62                                 file_put_contents('dbfail.out', printable($sql) . ' returned false' . "\n", FILE_APPEND);
  63                 }
  64
  65                 if(($result === true) || ($result === false))
  66                         return $result;
  67
  68                 $r = array();
  69                 if($result->num_rows) {
  70                         while($x = $result->fetch_array(MYSQL_ASSOC))
  71                                 $r[] = $x;
  72                         $result->free_result();
  73                 }
  74
  75                 if($this->debug == 2)
  76                         $debug_text .= printable(print_r($r, true). EOL);
  77                 elseif($this->debug == 3)
  78                         echo printable(print_r($r, true) . EOL) ;
  79
  80                 return($r);
  81         }
  82
  83         public function dbg($dbg) {
  84                 $this->debug = $dbg;
  85         }
  86
  87         public function escape($str) {
  88                 return @$this->db->real_escape_string($str);
  89         }
  90
  91         function __destruct() {
  92                 @$this->db->close();
  93         }
  94 }}
  95
  96 if(! function_exists('printable')) {
  97 function printable($s) {
  98         $s = preg_replace("~([\x01-\x08\x0E-\x0F\x10-\x1F\x7F-\xFF])~",".", $s);
  99         $s = str_replace("\x00",'.',$s);
 100         if(x($_SERVER,'SERVER_NAME'))
 101                 $s = escape_tags($s);
 102         return $s;
 103 }}
 104
 105 // Procedural functions
 106 if(! function_exists('dbg')) {
 107 function dbg($state) {
 108         global $db;
 109         $db->dbg($state);
 110 }}
 111
 112 if(! function_exists('dbesc')) {
 113 function dbesc($str) {
 114         global $db;
 115         return($db->escape($str));
 116 }}
 117
 118
 119 // Function: q($sql,$args);
 120 // Description: execute SQL query with printf style args.
 121 // Example: $r = q("SELECT * FROM `%s` WHERE `uid` = %d",
 122 //                   'user', 1);
 123
 124 if(! function_exists('q')) {
 125 function q($sql) {
 126
 127         global $db;
 128         $args = func_get_args();
 129         unset($args[0]);
 130         $ret = $db->q(vsprintf($sql,$args));
 131         return $ret;
 132 }}
 133
 134
 135 // Caller is responsible for ensuring that any integer arguments to
 136 // dbesc_array are actually integers and not malformed strings containing
 137 // SQL injection vectors. All integer array elements should be specifically
 138 // cast to int to avoid trouble.
 139
 140
 141 if(! function_exists('dbesc_array_cb')) {
 142 function dbesc_array_cb(&$item, $key) {
 143         if(is_string($item))
 144                 $item = dbesc($item);
 145 }}
 146
 147
 148 if(! function_exists('dbesc_array')) {
 149 function dbesc_array(&$arr) {
 150         if(is_array($arr) && count($arr)) {
 151                 array_walk($arr,'dbesc_array_cb');
 152         }
 153 }}