Two ways to pass a multiple-line string in PHP to JavaScript _php tips

PHP and JavaScript are beginners. There is a need recently:

For example, there is a multiple-line PHP string:

$a = <<<eof 
thy38 
csdn 
blog 
EOF;

When passed to JavaScript, it is equivalent to:

var c= ' thy38\n\ 
csdn\n\ 
blog ';

Because the understanding of these two languages is so low that you don't know how to Google, you have to find out the two ways:

1. First escape the PHP, then split, then turn to JSON, and then JavaScript parse, and finally use \ n stitching.

var b=json.parse (<?php echo ' \ '. Json_encode (Explode ("\ r \ n", $a)). ' \?>). Join (' \ n '); 

2. Arrange a hidden input on the page, and then give the value to it by PHP, and then the JavaScript reads from it, it realizes the transmission of the multiline value.

<input type= "hidden" id= ' testphp ' value= "<?php echo $a?>"/> 
var A=document.getelementbyid ("testphp") . value; 
var b=json.parse (<?php echo ' \ '. Json_encode (Explode ("\ r \ n", $a)). ' \?>). Join (' \ n '); 
alert (A==B); 

PS: The above method is in the discussion with a PHP plus JavaScript programmer classmate.
After writing the article back to think about, in fact, these two very winding method is derived from the PHP and JavaScript more than a line of string understanding.
Understanding is also simple, far less complex, direct string replacement on the line:

var d=<?php echo ' \ '. Str_replace ("\ r \ n", "\\n\\\n", $a). ' \ ';?>; 
alert (D==C);