Member Avatar for malatamil

validation for particular fields like input name="",textarea,select name="".

   <form method="post" id="myform" name="myform">
 <tr><td width="170"><div align="left">Company Name<span style="color:#F00;">*</span> :</div></td><td width="317"> <input type="text" name="companyname" placeholder="Company Name" value="<?php echo ucwords(strtolower(mysql_real_escape_string($_POST['companyname']))); ?>"/></td></tr>
        <tr><td><div align="left">Contact Person Name<span style="color:#F00;">*</span> :</div></td><td> <input type="text" name="conactperson" placeholder="Contact Person Name" value="<?php echo ucwords(strtolower(mysql_real_escape_string($_POST['conactperson']))); ?>"/></td>
        </tr>
        </form>

company name is mandatory but if i go to next fields i want to display one message near that companyame text box. am searching for this still not getting.if anyone knows about this validation please help me.

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Dani AI

Generated

asked for an inline validation message to appear as focus leaves the company-name field; pointed toward the jQuery Validation plugin for full-form rules. For a simple, immediate solution that runs before submit, combine a small client-side empty/format check with an optional debounced AJAX call to a server endpoint for checks the browser can't do (uniqueness, business logic). The server must always re-check on submit.

Minimal client-side pattern (bind on input/blur, debounce network calls, write message into an aria-live span):

<input id="companyname" name="companyname" type="text" aria-describedby="companyname-msg" />
<span id="companyname-msg" class="field-msg" aria-live="polite"></span>
$(function(){
  var timer;
  $('#companyname').on('input blur', function(){
    var $el = $(this);
    clearTimeout(timer);
    timer = setTimeout(function(){
      var val = $el.val().trim();
      var $msg = $('#companyname-msg');
      if (!val) {
        $msg.text('Company name is required').addClass('error');
        $el.attr('aria-invalid','true');
        return;
      }
      // optional server check
      $.ajax({
        url: 'validate_company.php',
        method: 'POST',
        dataType: 'json',
        data: { companyname: val }
      }).done(function(res){
        if (res.valid) {
          $msg.text('').removeClass('error');
          $el.removeAttr('aria-invalid');
        } else {
          $msg.text(res.message || 'Invalid').addClass('error');
          $el.attr('aria-invalid','true');
        }
      }).fail(function(){
        $msg.text('Validation failed').addClass('error');
      });
    }, 300); // 300ms debounce
  });
});

Server endpoint example (returns JSON {"valid":true/false,"message":"..."}). Use PDO prepared statements rather than deprecated mysql_* calls and sanitize/validate on the server:

<?php
header('Content-Type: application/json');
if ($_SERVER['REQUEST_METHOD'] !== 'POST') { http_response_code(405); echo json_encode(['valid'=>false]); exit; }
$name = trim($_POST['companyname'] ?? '');
if ($name === '') { echo json_encode(['valid'=>false,'message'=>'Company name required']); exit; }

try {
  $pdo = new PDO('mysql:host=localhost;dbname=yourdb;charset=utf8mb4','dbuser','dbpass', [PDO::ATTR_ERRMODE=>PDO::ERRMODE_EXCEPTION]);
  $stmt = $pdo->prepare('SELECT 1 FROM companies WHERE companyname = ? LIMIT 1');
  $stmt->execute([$name]);
  $exists = (bool) $stmt->fetchColumn();
  echo json_encode($exists ? ['valid'=>false,'message'=>'Name already used'] : ['valid'=>true]);
} catch (Exception $e) {
  http_response_code(500); echo json_encode(['valid'=>false,'message'=>'Server error']);
}

Notes: keep AJAX calls debounced, include CSRF token in requests for security, mark inputs with aria-invalid and use aria-live for announcements, and provide an HTML5 required fallback so the form behaves when JS is disabled. For full-form rule sets and nicer messages consider the jQuery Validation plugin (as suggested), but always duplicate client checks on the server before accepting data.

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Member Avatar for malatamil

thank you.. before clicking submit button validation method i want if that field is mandatory.

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