谢谢您，我正在尝试弄清楚为什么我的代码不运行 if（$ error！= true）{ 回声"工作";} 代码块。我希望以后用MySQL功能替换它，但是现在我需要知道如何在所有字段有效时使表单提交工作工作。
<head>
<style>
.error {color: #FF0000;}
</style>
</head>
<body>
<?php
// define variables and set to empty values
$error = $fnameErr = $lnameErr = $doberror = $SnameErr = $state_Err = $post_code_num_Err = $sex_Err= $emailErr = $pwd1 = "";
$fname = $lname = $dob = $street_name = $state =$post_code_num = $sex = $email = $pwd1_Err = "";
if ($_SERVER["REQUEST_METHOD"] == "POST") {
if (empty($_POST["fname"])) {
$fnameErr = "Name is required";
$error = true;
} else {
$fname = test_input($_POST["fname"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$fname)) {
$error = true;
$fnameErr = "Only letters and white space allowed";
}
}
if (empty($_POST["lname"])) {
$lnameErr = "last name is required";
$error = true;
} else {
$lname = test_input($_POST["lname"]);
// check if name only contains letters and whitespace
if (!preg_match("/^[a-zA-Z ]*$/",$lname)) {
$lnameErr = "Only letters and white space allowed";
$error = true;
}
}
if (empty($_POST["dob"])) {
$doberror = "dob name is required";
$error = true;
} else {
$dob = test_input($_POST["dob"]);
// check if name only contains letters and whitespace
if (!preg_match("/^(0?[1-9]|[12]d|3[01])/(0?[1-9]|1[012])/(19|20)dd$/",$dob)) {
$doberror = "format must match dd/mm/yyyy";
$error = true;
}
}
if (empty($_POST["street_name"])) {
$SnameErr = "street name is required";
$error = true;
} else {
$street_name = test_input($_POST["street_name"]);
// check if name only contains letters and whitespace
if (!preg_match("/d{1,3}.?d{0,3}s[a-zA-Z]{2,30}s[a-zA-Z]{2,15}/",$street_name)) {
$SnameErr = "must be in format like 123 fake street or 12/2 fake street";
$error = true;
}
}
if (empty($_POST["state"])) {
$state_Err = "state is required";
$error = true;
} else {
$state = test_input($_POST["state"]);
$error = true;
}
if (empty($_POST["post_code_num"])) {
$post_code_num_Err = "Post code is required";
$error = true;
} else {
$post_code_num = test_input($_POST["post_code_num"]);
// check if name only contains letters and whitespace
if (!preg_match("/^d{4,4}$/",$post_code_num)) {
$post_code_num_Err = "4 digit postcode only";
$error = true;
}
}
if (empty($_POST["sex"])) {
$sex_Err = "Gender is required";
$error = true;
} else {
$sex = test_input($_POST["sex"]);
}
if (empty($_POST["email"])) {
$emailErr = "Email is required";
$error = true;
} else {
$email = test_input($_POST["email"]);
// check if e-mail address is well-formed
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
$emailErr = "Invalid email format";
$error = true;
}
}
if (empty($_POST["pwd1"])) {
$pwd1 = "password is required";
$error = true;
} else {
$pwd1 = test_input($_POST["pwd1"]);
// check if name only contains letters and whitespace
if (!preg_match("/^(?=.*d)(?=.*[a-z])(?=.*[A-Z])w{6,}$/",$pwd1)) {
$pwd1_Err = "Must contain at least one number, one lowercase and one uppercase letter. must have a minimum of 6 characters";
$error = true;
}
}
if($error != true) {
echo "working";
}
}
function test_input($data) {
$data = trim($data);
$data = stripslashes($data);
$data = htmlspecialchars($data);
return $data;
}
?>
<h2>PHP Form Validation Example</h2>
<p><span class="error">* required field.</span></p>
<form method="post" action="<?php echo ($_SERVER["testphp.php"]);?>">
First Name:<br>
<input type="text" name="fname" value="<?php echo $fname;?>">
<span class="error">* <?php echo $fnameErr;?></span>
<br>
Last Name:<br>
<input type="text" name="lname" value="<?php echo $lname;?>">
<span class="error">* <?php echo $lnameErr;?></span>
<br>
Date of Birth:<br>
<input type="text" name="dob" value="<?php echo $dob;?>">
<span class="error">* <?php echo $doberror;?></span>
<br>
<fieldset>
<br>
<legend>Address:</legend>
<br>
Street Name:
<input type="text" name="street_name" value="<?php echo $street_name;?>">
<span class="error">* <?php echo $SnameErr;?></span>
<br>
State:
<select name="state" id="state" placeholder="Select a state"
<option value="">Please Select</option>
<option value="QLD">QLD</option>
<option value="NT">NT</option>
<option value="WA">WA</option>
<option value="SA">SA</option>
<option value="NSW">NSW</option>
<option value="ACT">ACT</option>
<option value="TAS">TAS</option>
<option value="VIC">VIC</option>
</select>
<span class="error">* <?php echo $state_Err;?></span>
<br>
Post Code:
<input type="text" name="post_code_num" value="<?php echo $post_code_num;?>">
<span class="error">* <?php echo $post_code_num_Err;?></span>
</fieldset>
<br>
Sex:
<input type="radio" name="sex" value="male" checked>Male
<input type="radio" name="sex" value="female">Female
<span class="error">* <?php echo $sex_Err;?></span>
<br>
Email:
<input type="text" name="email" value="<?php echo $email;?>">
<span class="error">* <?php echo $emailErr;?></span>
<br>
password:
<input type="password" name="pwd1" value="<?php echo $pwd1;?>">
<span class="error">* <?php echo $pwd1_Err;?></span>
<br>
<input type="submit"></input>
</form>
<?php
echo "<h2>Your Input:</h2>";
echo $fname;
echo "<br>";
echo $lname;
echo "<br>";
echo $house_num;
echo "<br>";
echo $street_name;
echo "<br>";
echo $state;
echo "<br>";
echo $post_code_num;
echo "<br>";
echo $dob;
echo "<br>";
echo $sex;
echo "<br>";
echo $email;
echo "<br>";
echo $pwd1;
echo "<br>";
?>
</body>
if (empty($_POST["state"])) {
$state_Err = "state is required";
$error = true;
} else {
$state = test_input($_POST["state"]);
$error = true;
}
所以总是$error=true。