问在php中使用JS变量需要巧妙的想法

EN

<?php
    // Array values come from PHP
    $cars = array("Volvo", "BMW", "Toyota");
?>

<script>
// Don't forget JSON_HEX_TAG when using this method!
var cars = <?php echo json_encode($cars, JSON_HEX_TAG); ?>;
// Equivalent to the following with the above data, but in Real Life
// the data might come from a dynamic source or also be used in PHP.
// var cars = ["Volvo", "BMW", "Toyota"];

// Now all the data is available to JavaScript, which can be treated as
// a normal JavaScript array.
var varCounter = 0;
var varName = function() {
    if (varCounter < cars.length) {
        // Do *not* use document.write after the document is closed
        alert(cars[varCounter]);
        varCounter++;
    } else {
        clearInterval(varName);
    }
};

// etc.
</script>