Three Methods to Remove Newlines in PHP

PHP handles line breaks differently across operating systems:

• Linux and Unix use \n
• macOS uses \r
• Windows uses \r\n to distinguish from Linux

Due to these differences, implementation methods vary across platforms. PHP offers three approaches to handle this:

1. Using str_replace to Replace Newlines

$str = str_replace(array("\r\n", "\r", "\n"), "", $str);

2. Using Regular Expression Replacement

$str = preg_replace('/\s*/', '', $str);

3. Using PHP's Built-in Variable (Recommended)

$str = str_replace(PHP_EOL, '', $str);

Source: Three Methods to Remove Newlines in PHP. All rights reserved by the original author.