How to remove newline characters in php?

How to delete newline characters in php: 1. Use "str_replace(PHP_EOL, '', string)" to delete. "PHP_EOL" is a newline character variable defined in PHP; 2. Use "preg_replace ('//s*/', '', string)" to delete.

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php Line breaks in different systems, and line breaks between different systems The implementation is different:

• Used in linux and unix\n

• Used in MAC\r

• window In order to reflect the difference from Linux\r\n

So the implementation methods are different on different platforms. PHP has three ways to solve it

Method 1: Use str_replace to replace newlines

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

The str_replace() function replaces some characters in a string (case sensitive).

Method 2: Using regular replacement

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

preg_replace function performs a regular expression search and replacement.

Method 3: Use variables defined by php (recommended)

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

PHP_EOL is a defined variable that represents the newline character of php. This variable will It varies according to the platform. Under Windows, it will be /r/n, under Linux, it will be /n, and under Mac, it will be /r. Just press the following to change the line.

Line breaks in PHP can be replaced by PHP_EOL, which can improve the source code level portability of the code

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