• 吴裕雄--天生自然PHP-MySQL-JavaScript学习笔记:JavaScript和PHP验证


    function validateForename(field)
    {
      return (field == "") ? "No Forename was entered.
    " : ""
    }
    
    function validateSurname(field)
    {
      return (field == "") ? "No Surname was entered.
    " : ""
    }
    
    function validateUsername(field)
    {
      if (field == "") return "No Username was entered.
    "
      else if (field.length < 5)
        return "Usernames must be at least 5 characters.
    "
      else if (/[^a-zA-Z0-9_-]/.test(field))
        return "Only a-z, A-Z, 0-9, - and _ allowed in Usernames.
    "
      return ""
    }
    
    function validatePassword(field)
    {
      if (field == "") return "No Password was entered.
    "
      else if (field.length < 6)
        return "Passwords must be at least 6 characters.
    "
      else if (!/[a-z]/.test(field) || ! /[A-Z]/.test(field) ||
               !/[0-9]/.test(field))
        return "Passwords require one each of a-z, A-Z and 0-9.
    "
      return ""
    }
    
    function validateAge(field)
    {
      if (field == "" || isNaN(field)) return "No Age was entered.
    "
      else if (field < 18 || field > 110)
        return "Age must be between 18 and 110.
    "
      return ""
    }
    
    function validateEmail(field)
    {
      if (field == "") return "No Email was entered.
    "
        else if (!((field.indexOf(".") > 0) &&
                   (field.indexOf("@") > 0)) ||
                  /[^a-zA-Z0-9.@_-]/.test(field))
          return "The Email address is invalid.
    "
      return ""
    }
    <?php // adduser.php
    
      // Start with the PHP code
    
      $forename = $surname = $username = $password = $age = $email = "";
    
      if (isset($_POST['forename']))
        $forename = fix_string($_POST['forename']);
      if (isset($_POST['surname']))
        $surname  = fix_string($_POST['surname']);
      if (isset($_POST['username']))
        $username = fix_string($_POST['username']);
      if (isset($_POST['password']))
        $password = fix_string($_POST['password']);
      if (isset($_POST['age']))
        $age      = fix_string($_POST['age']);
      if (isset($_POST['email']))
        $email    = fix_string($_POST['email']);
    
      $fail  = validate_forename($forename);
      $fail .= validate_surname($surname);
      $fail .= validate_username($username);
      $fail .= validate_password($password);
      $fail .= validate_age($age);
      $fail .= validate_email($email);
    
      echo "<!DOCTYPE html>
    <html><head><title>An Example Form</title>";
    
      if ($fail == "")
      {
        echo "</head><body>Form data successfully validated:
          $forename, $surname, $username, $password, $age, $email.</body></html>";
    
        // This is where you would enter the posted fields into a database,
        // preferably using hash encryption for the password.
    
        exit;
      }
    
      echo <<<_END
    
        <!-- The HTML/JavaScript section -->
    
        <style>
          .signup {
            border: 1px solid #999999;
          font:   normal 14px helvetica; color:#444444;
          }
        </style>
    
        <script>
          function validate(form)
          {
            fail  = validateForename(form.forename.value)
            fail += validateSurname(form.surname.value)
            fail += validateUsername(form.username.value)
            fail += validatePassword(form.password.value)
            fail += validateAge(form.age.value)
            fail += validateEmail(form.email.value)
          
            if (fail == "")     return true
            else { alert(fail); return false }
          }
    
          function validateForename(field)
          {
            return (field == "") ? "No Forename was entered.\n" : ""
          }
    
          function validateSurname(field)
          {
            return (field == "") ? "No Surname was entered.\n" : ""
          }
    
          function validateUsername(field)
          {
            if (field == "") return "No Username was entered.\n"
            else if (field.length < 5)
              return "Usernames must be at least 5 characters.\n"
            else if (/[^a-zA-Z0-9_-]/.test(field))
              return "Only a-z, A-Z, 0-9, - and _ allowed in Usernames.\n"
            return ""
          }
    
          function validatePassword(field)
          {
            if (field == "") return "No Password was entered.\n"
            else if (field.length < 6)
              return "Passwords must be at least 6 characters.\n"
            else if (!/[a-z]/.test(field) || ! /[A-Z]/.test(field) ||
                     !/[0-9]/.test(field))
              return "Passwords require one each of a-z, A-Z and 0-9.\n"
            return ""
          }
    
          function validateAge(field)
          {
            if (isNaN(field)) return "No Age was entered.\n"
            else if (field < 18 || field > 110)
              return "Age must be between 18 and 110.\n"
            return ""
          }
    
          function validateEmail(field)
          {
            if (field == "") return "No Email was entered.\n"
              else if (!((field.indexOf(".") > 0) &&
                         (field.indexOf("@") > 0)) ||
                        /[^a-zA-Z0-9.@_-]/.test(field))
                return "The Email address is invalid.\n"
            return ""
          }
        </script>
      </head>
      <body>
    
        <table border="0" cellpadding="2" cellspacing="5" bgcolor="#eeeeee">
          <th colspan="2" align="center">Signup Form</th>
    
            <tr><td colspan="2">Sorry, the following errors were found<br>
              in your form: <p><font color=red size=1><i>$fail</i></font></p>
            </td></tr>
    
          <form method="post" action="adduser.php" onSubmit="return validate(this)">
            <tr><td>Forename</td>
              <td><input type="text" maxlength="32" name="forename" value="$forename">
            </td></tr><tr><td>Surname</td>
              <td><input type="text" maxlength="32" name="surname"  value="$surname">
            </td></tr><tr><td>Username</td>
              <td><input type="text" maxlength="16" name="username" value="$username">
            </td></tr><tr><td>Password</td>
              <td><input type="text" maxlength="12" name="password" value="$password">
            </td></tr><tr><td>Age</td>
              <td><input type="text" maxlength="3"  name="age"      value="$age">
            </td></tr><tr><td>Email</td>
              <td><input type="text" maxlength="64" name="email"    value="$email">
            </td></tr><tr><td colspan="2" align="center"><input type="submit"
              value="Signup"></td></tr>
          </form>
        </table>
      </body>
    </html>
    
    _END;
    
      // The PHP functions
    
      function validate_forename($field)
      {
          return ($field == "") ? "No Forename was entered<br>": "";
      }
      
      function validate_surname($field)
      {
          return($field == "") ? "No Surname was entered<br>" : "";
      }
      
      function validate_username($field)
      {
        if ($field == "") return "No Username was entered<br>";
        else if (strlen($field) < 5)
          return "Usernames must be at least 5 characters<br>";
        else if (preg_match("/[^a-zA-Z0-9_-]/", $field))
          return "Only letters, numbers, - and _ in usernames<br>";
        return "";        
      }
      
      function validate_password($field)
      {
        if ($field == "") return "No Password was entered<br>";
        else if (strlen($field) < 6)
          return "Passwords must be at least 6 characters<br>";
        else if (!preg_match("/[a-z]/", $field) ||
                 !preg_match("/[A-Z]/", $field) ||
                 !preg_match("/[0-9]/", $field))
          return "Passwords require 1 each of a-z, A-Z and 0-9<br>";
        return "";
      }
      
      function validate_age($field)
      {
        if ($field == "") return "No Age was entered<br>";
        else if ($field < 18 || $field > 110)
          return "Age must be between 18 and 110<br>";
        return "";
      }
      
      function validate_email($field)
      {
        if ($field == "") return "No Email was entered<br>";
          else if (!((strpos($field, ".") > 0) &&
                     (strpos($field, "@") > 0)) ||
                      preg_match("/[^a-zA-Z0-9.@_-]/", $field))
            return "The Email address is invalid<br>";
        return "";
      }
      
      function fix_string($string)
      {
        if (get_magic_quotes_gpc()) $string = stripslashes($string);
        return htmlentities ($string);
      }
    ?>
    <!DOCTYPE html>
    <html>
      <head>
        <title>An Example Form</title>
        <style>
          .signup {
            border:1px solid #999999;
            font:  normal 14px helvetica;
            color: #444444;
          }
        </style>
    
        <script>
          function validate(form)
          {
            fail  = validateForename(form.forename.value)
            fail += validateSurname(form.surname.value)
            fail += validateUsername(form.username.value)
            fail += validatePassword(form.password.value)
            fail += validateAge(form.age.value)
            fail += validateEmail(form.email.value)
    
            if   (fail == "")   return true
            else { alert(fail); return false }
          }
    
          function validateForename(field)
          {
            return (field == "") ? "No Forename was entered.
    " : ""
          }
          
          function validateSurname(field)
          {
            return (field == "") ? "No Surname was entered.
    " : ""
          }
    
          function validateUsername(field)
          {
            if (field == "") return "No Username was entered.
    "
            else if (field.length < 5)
              return "Usernames must be at least 5 characters.
    "
            else if (/[^a-zA-Z0-9_-]/.test(field))
              return "Only a-z, A-Z, 0-9, - and _ allowed in Usernames.
    "
            return ""
          }
    
          function validatePassword(field)
          {
            if (field == "") return "No Password was entered.
    "
            else if (field.length < 6)
              return "Passwords must be at least 6 characters.
    "
            else if (! /[a-z]/.test(field) ||
                     ! /[A-Z]/.test(field) ||
                     ! /[0-9]/.test(field))
              return "Passwords require one each of a-z, A-Z and 0-9.
    "
            return ""
          }
    
          function validateAge(field)
          {
            if (isNaN(field)) return "No Age was entered.\n"
            else if (field < 18 || field > 110)
              return "Age must be between 18 and 110.
    "
            return ""
          }
    
          function validateEmail(field)
          {
            if (field == "") return "No Email was entered.
    "
              else if (!((field.indexOf(".") > 0) &&
                         (field.indexOf("@") > 0)) ||
                         /[^a-zA-Z0-9.@_-]/.test(field))
                return "The Email address is invalid.
    "
            return ""
          }
        </script>
      </head>
      <body>
        <table class="signup" border="0" cellpadding="2" cellspacing="5" bgcolor="#eeeeee">
          <th colspan="2" align="center">Signup Form</th>
          <form method="post" action="adduser.php" onsubmit="return validate(this)">
            <tr><td>Forename</td>
              <td><input type="text" maxlength="32" name="forename"></td></tr>
            <tr><td>Surname</td>
              <td><input type="text" maxlength="32" name="surname"></td></tr>
            <tr><td>Username</td>
              <td><input type="text" maxlength="16" name="username"></td></tr>
            <tr><td>Password</td>
              <td><input type="text" maxlength="12" name="password"></td></tr>
            <tr><td>Age</td>
              <td><input type="text" maxlength="3"  name="age"></td></tr>
            <tr><td>Email</td>
              <td><input type="text" maxlength="64" name="email"></td></tr>
            <tr><td colspan="2" align="center"><input type="submit" value="Signup"></td></tr>
          </form>
        </table>
      </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/tszr/p/12382871.html
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