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This article mainly shows you "what is the meaning of the slash in php". The content is simple and clear. I hope it can help you solve your doubts. Let the editor lead you to study and learn this article "what is the meaning of the slash in php".

There are two kinds of slashes in php: 1, the forward slash "/" symbol, which is equivalent to a parenthesis wrapped around the content; 2, the backslash "\" symbol, which indicates the escape character.

This article operating environment: Windows7 system, PHP7.1 version, DELL G3 computer

The difference between php forward slash'/ 'and backslash'\'

$val = preg_replace ('/ ([\ x00 -\ x08,\ x0b -\ x0c,\ x0e -\ x19]) /',', $val)

A positive diagonal bar is used to wrap the content in parentheses.

The backslash is:

Marks the next character as a special character, or a literal character, or a backward reference, or an octal escape character.

For example,'n 'matches the character "n".' \ n' matches a newline character. The sequence'\ 'matches "\" and "(" matches "(".

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