如何在php代码中内嵌javascript代码

php代码中可以内嵌JavaScript/html/css代码，使用以下方式即可：

变量=<<<start start文章源自IT老刘-https://wp.itlao6.com/11104.html

JavaScript/html/css代码文章源自IT老刘-https://wp.itlao6.com/11104.html

start;文章源自IT老刘-https://wp.itlao6.com/11104.html

以下为代码示例：文章源自IT老刘-https://wp.itlao6.com/11104.html

<?php $cyg=<<<start文章源自IT老刘-https://wp.itlao6.com/11104.html

<script type="text/javascript">文章源自IT老刘-https://wp.itlao6.com/11104.html

alert("你好,我是IT老五"); 文章源自IT老刘-https://wp.itlao6.com/11104.html

</script> 文章源自IT老刘-https://wp.itlao6.com/11104.html

start;文章源自IT老刘-https://wp.itlao6.com/11104.html

echo $cyg;文章源自IT老刘-https://wp.itlao6.com/11104.html

注意：=<<<start后的script等代码一定要换行编写。文章源自IT老刘-https://wp.itlao6.com/11104.html

 文章源自IT老刘-https://wp.itlao6.com/11104.html

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文章源自IT老刘-https://wp.itlao6.com/11104.html文章源自IT老刘-https://wp.itlao6.com/11104.html