从PC获取当前时间并将其保存在数据库中

Question

I have a database in mysql named apply(id, user, time_apply) . I have set structure for time_apply to "datetime"

I have a php script which is trying to get current DATE and TIME from a user's pc and store it my database. User's pc can be anywhere in the world.

<?php

$timeString='
<script language="javascript">
var today = new Date();
document.write(today);
</script> ';

//id is my database primary key, so I don't insert anything inside

mysql_query("INSERT INTO `apply` VALUES ('', '$session_user_id', '$timeString') "); 


?>

The problem is that after mysql_query executed, I cannot insert current user's date and time in my database. I get something like : 0000-00-00 00:00:00

Any idea how to fix it?

Answer 1

ugly coding (but this is what you wanted ) :)

$timeString='
<script language="javascript">
var today = new Date();
var dd = today.getDate();
var mm = today.getMonth()+1; //January is 0!
var yyyy = today.getFullYear();

if(dd<10) {
    dd="0"+dd
} 

if(mm<10) {
    mm="0"+mm
} 

today = mm+"/"+dd+"/"+yyyy + " " +today.getHours() + ":" + today.getMinutes()+":" + today.getSeconds();
document.write(today);
</script> ';


echo "INSERT INTO `apply` VALUES ('test', '1', '$timeString') ";

output

INSERT INTO `apply` VALUES ('test', '1', ' 05/29/2014 22:50:4 ')

Answer 2

I don't know why you would want to capture the client's time but here's how you would do it.

First you'll need to separate your javascript and php script. You can have php output javascript but not the way you have it written.

You can create a hidden element that gets set whenever the javascript event of your choice fires. I used the onclick event of the submit button you could use page_load or whatever. You could then pull that value from the php $_POST variables collection.

<script language="javascript">
function submit_OnClick() {
    document.getElementById("clientDate").value =  currentdate.getDate() + "/"
            + (currentdate.getMonth()+1)  + "/" 
            + currentdate.getFullYear() + " @ "  
            + currentdate.getHours() + ":"  
            + currentdate.getMinutes() + ":" 
            + currentdate.getSeconds();
     }
</script> 


<?php

$timeString=$_POST["clientDate"];
mysql_query("INSERT INTO Apply (id, user, time_apply) VALUES ('', '$session_user_id', '$timeString') "); 

?>

<form method="post">
    <input type='hidden' id='clientDate' />
    <input type="submit" value="submit" id='submitForm' OnClick="submit_OnClick();"/>
    <!-- The rest of your form goes here -->
</form>

See this related post for more options and analysis into javascript dates:

Getting current date and time in JavaScript

Answer 3

You have a complete misunderstanding of how PHP and JS operate. You do not have any actual JS code in your snippet above. You have a PHP STRING which happens to contain some text that LOOKS like Javascript.

But since PHP has absolutely NO clue as to what JS is, let alone execute it, you're literally stuffing your JS code into MySQL as a date value. MySQL is of course saying "what the heck is this" and trashing it to the default 0000-00-00 "bad date provided" value.

Remember: PHP executes on the server, JS executes on the client.

There is absolutely NO reason to have a client generate dates for use in your server-side DB, when the server-side DB is perfectly capable of generating its own dates:

INSERT ... VALUES(..., now());
                       ^^^^^---literally all you need.

Answer 4

1) Instead of adding the data through PHP, you can declare the field (time_apply) as TIMESTAMP, and attribute as ON UPDATE CURRENT TIMESTAMP. So that, on adding/pdating the data, the field will have the updated current time.

2) Or else you can use $timeString = date('Ymd H:i:s'); value for inserting current time.

3) Or else you can use NOW() method for the field for the value while writing the script.