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PHP5/MYSQL - FI Value1 = 价值2, 然后死亡
原标题:PHP5/MYSQL - IF value1 = value2 then die else do code

我试图提出一个简单的<代码>IF:

IF $un = mysql_result
  die
else
  do some code.

这是防止多个用户使用同一名称的过程。

问题在于,它打上了一切,尽管它没有:

if ($result =  $UN ) {
  $errorMessage = "Name has been Taken";
  echo "User name is allready being Used, ";
  $_SESSION[ ERRMSG_ARR ] = $errormessage;
  echo " Please Go Back and Try Again";
  //header("Location: register.php");
  exit();
}
else {
  echo "not taken -- ";
}
问题回答

在您的<代码>if中,将单一等同代码<>=改为双重等值=,以进行比较。 更理想的是,使用三重平等操作器=,对类型进行比较。

Also, remove the quotes from the $UN variable you are using so that its actual value is used in the comparison.

它击中了所收所有物品,因为那是转让经营人,而不是比较经营人。

if($result ==  $UN ) {
// your code
}

你们是否希望把所花的钱与扼制的联合国美元相比较? 这具有令人厌恶的性质。 想对此进行检查。





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