php trim definition and syntax introduction to remove null characters_PHP tutorial

Definition and Usage
trim() function removes whitespace characters and other predefined characters from both ends of a string.

Syntax
trim(string,charlist) Parameter Description

string Required. Specifies the string to check.

charlist optional. Specifies the string to be converted. If this parameter is omitted, all the following characters are deleted:

Copy code The code is as follows:

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TechArticleDefinition and Usage The trim() function removes whitespace characters and other predefined characters from both ends of a string. Syntax trim(string,charlist) Parameter Description string Required. Specifies the string to check. ...