php - 如何用 if 条件解决 JavaScript 中的 setTimeout 问题？

Question

这是我的脚本，它是 php 和 javascript 的组合

<?php
$countdown = strtotime("22:00") - time();
$itemtime = "22:00";
$realtime = substr(date('H:i'),0,5);
?>

<script>
var itemtime = "$itemtime";
var countdown = '$countdown';
var url = "$redirectpage";
var realtime = "$realtime";

// HOW WILL I ADD AN IF STATEMENT WITH THE SETTIMEOUT FUNCTION
// WHEREBY, if(realtime == itemtime) ..that's the only time the 
// redirection should occur

setTimeout(function(){
 location.href='$redirectpage'; 
    },countdown * 1000);

</script>

Answer 1

<?php
$countdown = strtotime("22:00") - time();
$itemtime = "22:00";
$realtime = substr(date('H:i'),0,5);
?>

<script>
var itemtime = "<?php echo $itemtime;?>";
var countdown = '<?php echo $countdown;?>';
var url = "$redirectpage";
var realtime = "<?php echo $realtime;?>";

// HOW WILL I ADD AN IF STATEMENT WITH THE SETTIMEOUT FUNCTION
// WHEREBY, if(realtime == itemtime) ..that's the only time the 
// redirection should occur

setTimeout(function(){
 if(realtime == itemtime) location.href='$redirectpage'; 
},countdown * 1000);
</script>

假设 $redirectpage 是在 JavaScript 而不是 PHP 中设置的。如果它是在 PHP 中设置的，您需要像我上面那样分配它。