Differences between three string delimiters in PHP

The difference between the three string delimiters in PHP is single quotation marks and double quotation marks. < <The differences are as follows: <p>

Single quotes: variables contained in single quotes are not parsed, but output as is.

For example, $ book = 'computer ';

$ StrTitle = 'This is $ Book'; // The output is This is $ book.

Double quotation marks: PHP parses variables contained in double quotation marks.

For example, $ book = "Computer ";

$ StrTitle = "This is $ book"; // The output is This is Computer

<: It is mainly used for some large text content. if there are defined variables in the middle, PHP will parse them.

To < <Add any name that you like, as shown in <

For example:

Echo <

Www.mssqw.com is a professional website construction and promotion network company that provides you with a full range of network services.

HEREDOC;

?>

Based on the above, we can see that the efficiency of single quotes is higher than that of the last two. Therefore, the use process should be determined as appropriate.

Type = "text/javascript"> AjaxAction ("/Ajax. Asp? Action = ShowSpecial & LogID = 33 & ShowType = 1 ");

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