How to remove the carriage return character in a string in php

4 methods: 1. Use ltrim() to remove the carriage return character on the left side of the string, the syntax is "ltrim(string)"; 2. Use rtrim() to remove the carriage return character on the right side of the string. , syntax "rtrim(string)"; 3. Use trim() to remove carriage returns on both sides of the string, syntax "trim(string)"; 4. Use preg_replace() with regular expressions to remove all carriage returns symbol, syntax "preg_replace('/\r|\n/','', string)".

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

php removes strings Methods for carriage returns

Method 1: Use ltrim() to remove

ltrim() can remove the carriage return on the left side of the string Character

Description: The

ltrim() function removes whitespace characters or other predefined characters on the left side of the string.

ltrim(string,charlist)

Method 2: Use rtrim() to remove

rtrim() can remove the carriage return character on the right side of the string

Description:

rtrim() function removes blank characters or other predefined characters on the right side of the string.

rtrim(string,charlist)

Parameters can refer to ltrim().

Method 3: Use trim() to remove

trim() can remove carriage returns on both sides of the string

Description:

trim() function removes blank characters or other predefined characters on both sides of a string.

trim(string,charlist)

Parameters can refer to ltrim().

Method 4: Use preg_replace() to remove

The preg_replace() function can be used with regular expressions to remove all carriage returns (line feeds).

The preg_replace function performs a regular expression search and replace.

Just use the preg_replace function to perform a regular expression search for carriage return characters in the string and replace them with empty characters.

Regular expression used:/\r|\n/

Example:

Recommended learning: "PHP Video Tutorial"

The above is the detailed content of How to remove the carriage return character in a string in php. For more information, please follow other related articles on the PHP Chinese website!