Nowdocs are to single-quoted strings what heredocs are to double-quoted strings. A nowdoc is specified similarly to a heredoc, but no parsing is done inside a nowdoc. The construct is ideal for embedding PHP code or other large blocks of text without the need for escaping. It shares some features in common with the SGML <![CDATA[ ]]> construct, in that it declares a block of text which is not for parsing.
A nowdoc is identified with the same <<< sequence used for heredocs, but the identifier which follows is enclosed in single quotes, e.g. <<<‘EOT’. All the rules for heredoc identifiers also apply to nowdoc identifiers, especially those regarding the appearance of the closing identifier.
Allows creating multiple lines of string without using quotations.
Heredoc is a robust way to create string in PHP with more lines but without using quotations.
PEAR is short for “PHP Extension and Application Repository” and a framework and repository for reusable PHP components. . Stig S. Bakken founded the PEAR project in 1999 to promote the re-use of code that performs common functions.The purpose of PEAR is to provide:
- A structured library of open-source code for PHP users
- A system for code distribution and package maintenance
- A standard style for code written in PHP
- PEAR’s mission is to provide reusable components, lead innovation in PHP, provide best practices for PHP development and educate developers.
- Offers a command-line interface that can be used to automatically install “packages”.
echo() and print() are language constructs in PHP, both are used to output strings. echo is marginally faster than print.
echo() can take multiple expressions whereas print cannot take multiple expressions.
Print return true or false based on success or failure whereas echo doesn’t return true or false.