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,$db);
  19                 if((mysqli_connect_errno()) && (! install))
  20                         system_unavailable();
  21         }
  22
  23         public function q($sql) {
  24                 global $debug_text;
  25
  26                 if(! $this->db )
  27                         return false;
  28
  29                 $result = @$this->db->query($sql);
  30
  31                 if($this->debug) {
  32
  33                         $mesg = '';
  34
  35                         if($this->db->mysqli->errno)
  36                                 $debug_text .=  $this->db->mysqli->error . EOL;
  37
  38                         if($result === false)
  39                                 $mesg = 'false';
  40                         elseif($result === true)
  41                                 $mesg = 'true';
  42                         else
  43                                 $mesg = $result->num_rows.' results' . EOL;
  44
  45                         $str =  'SQL = ' . $sql . EOL . 'SQL returned ' . $mesg . EOL;
  46
  47                         switch($this->debug) {
  48                                 case 3:
  49                                         echo $str;
  50                                         break;
  51                                 default:
  52                                         $debug_text .= $str;
  53                                         break;
  54                         }
  55                 }
  56
  57                 if(($result === true) || ($result === false))
  58                         return $result;
  59
  60                 $r = array();
  61                 if($result->num_rows) {
  62                         while($x = $result->fetch_array(MYSQL_ASSOC))
  63                                 $r[] = $x;
  64                         $result->free_result();
  65                 }
  66
  67                 if($this->debug == 2)
  68                         $debug_text .= printable(print_r($r, true). EOL);
  69                 elseif($this->debug == 3)
  70                         echo printable(print_r($r, true) . EOL) ;
  71
  72                 return($r);
  73         }
  74
  75         public function dbg($dbg) {
  76                 $this->debug = $dbg;
  77         }
  78
  79         public function escape($str) {
  80                 return @$this->db->real_escape_string($str);
  81         }
  82
  83         function __destruct() {
  84                 @$this->db->close();
  85         }
  86 }}
  87
  88 if(! function_exists('printable')) {
  89 function printable($s) {
  90         $s = preg_replace("~([\x01-\x08\x0E-\x0F\x10-\x1F\x7F-\xFF])~",".", $s);
  91         return(escape_tags(str_replace("\x00",'.',$s)));
  92 }}
  93
  94 // Procedural functions
  95 if(! function_exists('dbg')) {
  96 function dbg($state) {
  97         global $db;
  98         $db->dbg($state);
  99 }}
 100
 101 if(! function_exists('dbesc')) {
 102 function dbesc($str) {
 103         global $db;
 104         return($db->escape($str));
 105 }}
 106
 107
 108 // Function: q($sql,$args);
 109 // Description: execute SQL query with printf style args.
 110 // Example: $r = q("SELECT * FROM `%s` WHERE `uid` = %d",
 111 //                   'user', 1);
 112
 113 if(! function_exists('q')) {
 114 function q($sql) {
 115
 116         global $db;
 117         $args = func_get_args();
 118         unset($args[0]);
 119         $ret = $db->q(vsprintf($sql,$args));
 120         return $ret;
 121 }}
 122
 123
 124 // Caller is responsible for ensuring that any integer arguments to
 125 // dbesc_array are actually integers and not malformed strings containing
 126 // SQL injection vectors. All integer array elements should be specifically
 127 // cast to int to avoid trouble.
 128
 129
 130 if(! function_exists('dbesc_array_cb')) {
 131 function dbesc_array_cb(&$item, $key) {
 132         if(is_string($item))
 133                 $item = dbesc($item);
 134 }}
 135
 136
 137 if(! function_exists('dbesc_array')) {
 138 function dbesc_array(&$arr) {
 139         if(is_array($arr) && count($arr)) {
 140                 array_walk($arr,'dbesc_array_cb');
 141         }
 142 }}