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POError in Jquery and Ajax
 

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    <p>I write the code for uploading image in local machine in ajax and jquery. And if condition is not executed. </p> <p>Here is the fnUploadImage script.</p> <pre><code>function fnUploadPhoto() { var image = $("#txtUploadImage").val(); var objUploadImage = new Object(); objUploadImage.ImageName = image; objUploadImage.UserID = &lt;?php echo $_SESSION['UserId']; ?&gt; $.ajax({ type:"POST", url:"db.php?UploadImage", data: {data:objUploadImage}, dataType:"json", async:false, success: function(response) { alert(response.ErrorMessage); if(response.IsError) $("#errorUploadPhoto")[0].innerHTML = response.ErrorMessage; else $("#errorUploadPhoto")[0].innerHTML = response.SuccessMessage; }, error:function(response) { alert("Error: " + response.ErrorMessage); } }); } </code></pre> <p>And this function calls the db.php UploadImage function which is as follows:</p> <pre><code>function UploadImage($data) { $allowedExts = array("gif", "jpeg", "jpg", "png"); $temp = explode(".", $_FILES["file"]["txtUploadImage"]); $extension = end($temp); if ((($_FILES["file"]["type"] == "image/gif") || ($_FILES["file"]["type"] == "image/jpeg") || ($_FILES["file"]["type"] == "image/jpg") || ($_FILES["file"]["type"] == "image/pjpeg") || ($_FILES["file"]["type"] == "image/x-png") || ($_FILES["file"]["type"] == "image/png")) &amp;&amp; in_array($extension, $allowedExts)) { if ($_FILES["file"]["error"] &gt; 0) { die(json_encode(array("IsError" =&gt; true, "ErrorMessage" =&gt; "Error"))); //echo "Return Code: " . $_FILES["file"]["error"] . "&lt;br&gt;"; json_encode(array("IsError" =&gt; true, "ErrorMessage" =&gt; "Return Code: " . $_FILES["file"]["error"])); } else { if (file_exists("profile_images/" . $_FILES["file"]["txtUploadImage"])) { //echo $_FILES["file"]["name"] . " already exists. "; json_encode(array("IsError" =&gt; true, "ErrorMessage" =&gt; "Filename already exists.")); } else { if($_FILES["file"]["size"]/1024 &lt; 20) { move_uploaded_file($_FILES["file"]["tmp_name"], "profile_images/" . $_FILES["file"]["txtUploadImage"]); //echo "Stored in: " . "profile_images/" . $_FILES["file"]["name"]; json_encode(array("IsError" =&gt; false, "SuccessMessage" =&gt; "Image uploaded successfully.")); } else { json_encode(array("IsError" =&gt; true, "ErrorMessage" =&gt; "Minimum image size is 20 kb.")); } } } } else { //echo "Invalid file."; json_encode(array("IsError" =&gt; true, "ErrorMessage" =&gt; "Invalid file.")); } } </code></pre> <p>When i run this script it shows in me the Error called undefined. Please help me to solve this. </p>
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    1. USKhushang Bhavnagarwala.
    1. USKhushang Bhavnagarwala.
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      1. POError in Jquery and Ajax
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    1. COdo you need quotes around the value for UserID. EG objUploadImage.UserID = "<?php echo $_SESSION['UserId']; ?>";
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      1. USGwyn Howell
    2. COI only need userid. quotes are does not matter.
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      1. POError in Jquery and Ajax
      1. USKhushang Bhavnagarwala.
    3. COWhich bit is showing you undefined? Is it the value of response.ErrorMessage? If so, you need to make sure your server code (ie your php script) returns a JSON string which includes the key ErrorMessage. EG {"ErrorMessage":"Some Error Message"}. If your PHP script doesn't return this construct, the variable will not exists, and therefore you will get undefined in your js code.
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      1. USGwyn Howell
 

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