Javascript：标头未定义

I already tried the 2 re-directions in JavaScript, the window.location.href() and header() but always show me an error:

ReferenceError: header is not defined

My code from PHP:

echo "<script> header('location: index.php');</script>";

There's no header() function in JavaScript. header() is a PHP function. Here is one way to redirect using JS:

echo "<script> window.location.href = 'index.php'; </script>";

Or in PHP:

header('Location: index.php');
exit;

you dont need to use jquery try this

echo  header('Location: index.php');
exit;

You can easily achieve with Below Code:

For JavaScript in PHP:

echo '<script>window.location.href="YOURURL.COM"</script>';

For Simple PHP:

echo header('Location: '."YOURURL.COM");

header() is a php function. and header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP.

<?php
header("Location: index.php"); /* Redirect browser */

/* Make sure that code below does not get executed when we redirect. */
exit;
?>

ref: http://php.net/manual/en/function.header.php

in js try, window.location.href = "index.php" //redirectUrl