Here document
A SECTION OF A SOURCE CODE FILE THAT IS TREATED AS IF IT WERE A SEPARATE FILE
Here-document; Heredoc; HEREDOC; Here doc; Here-string; Heredocs; Here script; Nowdoc; Here string; Hereis; Here-script; Here documents
In computing, a here document (here-document, here-text, heredoc, hereis, here-string or here-script) is a file literal or input stream literal: it is a section of a source code file that is treated as if it were a separate file. The term is also used for a form of multiline string literals that use similar syntax, preserving line breaks and other whitespace (including indentation) in the text.