How to correctly output JS statements in PHP

A computer program is a series of "instructions" that are "executed" by the computer. In programming languages, these programming instructions are called statements. A JavaScript program is a series of programming statements. JavaScript statements are composed of: values, operators, expressions, keywords, and comments

1. Method:

echo "<script></script>";

2. Example:

<?php
$classState="";
if($state==0){
 $classState="已下课";
 }else{
 $classState="正在上课";
 }
echo "<script type=&#39;text/javascript&#39;>
function getState(){      
    var cs = ".$state.";
    return cs;
} 
</script>";
?>

3. JS garbled problem occurs:

header("Content-type:text/html;charset:utf-8")
<script type="charset:utf-8;"></script>

Keep PHP encoding is consistent with the browser parsed page encoding .

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