php - 将PHP字符串传递给JavaScript变量（并转义换行符）[复制](Pass a PHP string to a JavaScript variable (and escape newlines) [duplicate])

Question

This question already has an answer here:

(这个问题在这里已有答案：)

• How do I pass variables and data from PHP to JavaScript?

  (如何将变量和数据从PHP传递到JavaScript？)

  19 answers

  (19个答案)

What is the easiest way to encode a PHP string for output to a JavaScript variable?

(编码PHP字符串以输出到JavaScript变量的最简单方法是什么？)

I have a PHP string which includes quotes and newlines.

(我有一个PHP字符串，其中包括引号和换行符。)

I need the contents of this string to be put into a JavaScript variable.

(我需要将此字符串的内容放入JavaScript变量中。)

Normally, I would just construct my JavaScript in a PHP file, à la:

(通常，我只是在PHP文件中构建我的JavaScript，àla：)

<script>
  var myvar = "<?php echo $myVarValue;?>";
</script>

However, this doesn't work when $myVarValue contains quotes or newlines.

(但是，当$myVarValue包含引号或换行符时，这不起作用。)

  ask by David Laing translate from so

Answer 1

Expanding on someone else's answer:

(扩展别人的答案：)

<script>
  var myvar = <?php echo json_encode($myVarValue); ?>;
</script>

Using json_encode() requires:

(使用json_encode（）需要：)

• PHP 5.2.0 or greater

  (PHP 5.2.0或更高版本)

• $myVarValue encoded as UTF-8 (or US-ASCII, of course)

  ($myVarValue编码为UTF-8（当然是US-ASCII）)

Since UTF-8 supports full Unicode, it should be safe to convert on the fly.

(由于UTF-8支持完整的Unicode，因此动态转换应该是安全的。)

Note that because json_encode escapes forward slashes, even a string that contains </script> will be escaped safely for printing with a script block.

(请注意，因为json_encode转义正斜杠，所以即使是包含</script>的字符串也会安全地转义，以便使用脚本块进行打印。)