How do I write the <<<TOC thing in PHP?

问题

I forgot how to write the one command that looked something like this

<<TOC


bla bla

bal bal


TOC;

how was it written again?

回答1:

These are called heredocs.

回答2:

It works like this:

$foo = <<<TOKEN
multi
line
string
TOKEN;

TOKEN can be anything you want as long as you being and end the heredoc with the same exact thing.

回答3:

Yes that is corect syntax for using a heredoc, however make sure that TOC; line is not indented or it will not work. FYI you can call it anything you want such as HTML not just TOC.

回答4:

Good Examples:

$foo = <<<TOKEN⁋
multi⁋
line⁋
string⁋
TOKEN;⁋

However, these don't work

$foo = <<<TOKEN‧anything here⁋
multi⁋
line⁋
string⁋
TOKEN;‧anything here⁋

$foo = <<<TOKEN
multi⁋
line⁋
string⁋
‧TOKEN;

$foo = <<<TOKEN
multi⁋
line⁋
string⁋
→TOKEN;

The closing token must be on its own line, hard up against the left margin, followed directly with its following semi colon, followed directly with a carriage return.

来源：https://stackoverflow.com/questions/571894/how-do-i-write-the-toc-thing-in-php