How can to use javascript getTime() with php variable on it?
Question
Im trying yo compare two dates, 1 is the date today second is the date based in my database(SQL Query). They told me to use new Date() but I'm confused how can I insert php variable there. So here's my code:
<script type="text/javascript">
var today = new Date();
var expired = new Date(today);
function myDIV() {
if (today >= expired) {
document.getElementById("myDiv").style.backgroundColor="#ff4d4d";
}
}
</script>
What I'm trying to do is whenever the second date is the same date as today, the div will change it's color. So I've tried using >= and == but no luck. Also I tried to do this:
<script type="text/javascript">
var today = new Date();
var expired = new Date($passport_expiration);
function myDIV() {
if (today.getTime() >= expired.getTime()) {
document.getElementById("myDiv").style.backgroundColor="#ff4d4d";
}
}
</script>
The format of the date is mm/dd/Y
2 answers
solution1
0 ACCPTED 2016-07-16 06:27:27
<script type="text/javascript">
var today = new Date();
var expired = new Date("<?php echo $passport_expiration; ?> ");
alert(expired);
function myDIV() {
if (today.getTime() >= expired.getTime()) {
document.getElementById("myDiv").style.backgroundColor="#ff4d4d";
}
}
</script>
Working copy
<?php
#$passport_expiration = "07/12/2016";
$passport_expiration = "07/18/2016";
?>
<!DOCTYPE html>
<html>
<head></head>
<body>
<script type="text/javascript">
var today = new Date();
var expired = new Date("<?php echo $passport_expiration; ?> ");
alert(today.getTime() >= expired.getTime());
</script>
</body>
</html>
solution2
0 2016-07-16 06:40:48
Oh dates are fun! There's a few things to think about.
- Is the PHP date the local date, or UTC?
- If you're using
getTime()from JavaScript you're getting the number of milliseconds since 1970, so any date today won't equal your date from PHP which will convert to the time at midnight. - Be careful with two digit years. Although you're probably safe for another 80 years or so.
- You said in the question you need to know when the days match . Could it just be when expired is less than right now? If not, you need to 'round down' the current time to the nearest day. I've broken it all apart so you can more easily go an look up the functions if you want.
var testDate = '7/16/16'; var today = new Date(); var month = today.getMonth() + 1; var day = today.getDate(); var fullYear = today.getFullYear() - 2000; var todayString = month + '/' + day + '/' + fullYear; console.log(todayString); console.log(testDate); console.log(todayString === testDate);
If it's all a bit daunting and you'll need to be working with JavaScript dates a lot, check out momentjs (although it's relatively huge if that's a concern).
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