Using the value of a PHP variable to modify the current time in javascript

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I have a PHP page which, among other things, assigns a value to the $deviance variable. The value of this variable is always an integer, generally between 0 and 45.

I then need javascript to use the $deviance value to be added as minutes to current time as determined by javascript.

For example, if $deviance = 10, then a current time of 13:55:10 becomes 14:05:10, so that these values result:

  • var hour = 14
  • var minute = 5
  • var second = 10

In PHP, I calculate the value of $deviance thusly:

$a = new DateTime("$str_deviation");
$b = new DateTime('12:00');

$deviant = $a->diff($b);

$deviance = ( ( $deviant->format('%H') * 60 ) + ( $deviant->format('%i') ) );

Then, I use the PHP variable in javascript:

var deviation=<?php echo json_encode($deviance); ?>;

var now = new Date();
now.setMinutes( now.getMinutes() + deviation);
document.write( now );

var hour = now.getHours();
var minute = now.getMinutes();
var second = now.getSeconds();

Any help in finding my error will be greatly appreciated!

[Using: Standard LAMP config on Debian 11 server]

php javascript
1 Answers

The problem is the use of json_encode.

You can solve the problem by changing

var deviation=<?php echo json_encode($deviance); ?>;

to

var deviation=<?php echo $deviance; ?>;

Thank you to @Lelio and @dave!

user_75258020
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