HTML换行符如何在PHP中呈现？

Question

I have a <textarea> in which I enter multiple numbers, one on each line(by pressing enter to go to new line in the text area). I receive these numbers on my server side after form submission. Let's call the <textarea> 's input 'X' . When I echo 'X' to the browser, the numbers in ' X' are separated by space. I know that HTML doesn't support '\\n' character. But, on my server side, I want to use explode() function to get all numbers in 'X' as separate elements of an array. Now, I am not able to find the delimiter which should be used in explode() . I tried using '\\n' as delimiter but it doesn't separate the numbers after using explode() . Thus, I am not using the right delimiter. So, my question is 'what is the delimiter I should use and how is a HTML new line character(made by pressing enter in <textarea> ) rendered in PHP ? Please remember my purpose is not echoing on browser, my purpose is to separate the numbers using explode()

Answer 1

You must use "\\n" instead of '\\n'. This is because only inside of " the special characters are converted to their real character codes. They stay as they are inside of ' though.

See the following example code:

<?php
header('content-type: text/plain');
$test = 'test\ntest';
echo $test;
/*
test\ntest
*/

$test = "test\ntest";
echo $test;
/*
test
test
/*