What does line break represent in php?

Line breaks in PHP can be represented by the following characters: "\n" (line feed character), "\r" (carriage return character) and "\r\n" (carriage return character). For cross-platform compatibility, it is recommended to use "\n" as the newline character. Newlines can be used via echo/print delimited output text, file writing delimited lines, and string concatenation.

Line breaks in PHP

In PHP, line breaks can be represented by the following characters:

• "\n": Line feed (LF, Line Feed)
• "\r": Carriage return (CR, Carriage Return)
• "\r\n": Carriage Return Line Feed (CRLF, Carriage Return Line Feed)

Carriage Return and Line Feed Difference

• Carriage return (CR) : Move the cursor to the beginning of the line.
• Line feed (LF) : Move the cursor to the next line.

Cross-platform newline character

In different operating systems, the newline character is represented differently:

• Windows: "\r\n"
• macOS, Linux: "\n"

In order to ensure that the code is compatible on different platforms, it is recommended to use "\n" as a newline character.

Using newlines

To use newlines in PHP code, you can use the following methods:

• echo or print : Use newline characters to delimit the output text.
• File writing: Use newlines to separate lines in file writing operations.
• String concatenation: Concatenate strings together using newlines.

Example

The following example shows how to use newlines to delimit echo output:

<code class="php"><?php
echo "这是第一行\n";
echo "这是第二行\n";
echo "这是第三行\n";
?></code>

This will output:

<code>这是第一行
这是第二行
这是第三行</code>

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