Php Echo

The echo and print statements are used to display the strings in PHP programs. While both, the echo and PHP print statements, are not functions but are language constructs. That means you do not need to use parenthesis like in the normal functions. PHP - Get bool to echo false when false. Ask Question Asked 10 years, 2 months ago. Active 1 year, 4 months ago. Viewed 165k times 184. The following code doesn't.

PHP Hello WorldPlex on tizen. – What is it?

You cannot have PHP echo more PHP code to be evaluated because PHP interprets your code in a single pass. If you have, say, php echo 'php echo 'hello';?';?, You will literally get the text, php echo 'hello';? as output, and the interpreter will not touch it. You can, however, jump in and out of PHP at will. Echo also has a shortcut syntax, where you can immediately follow the opening tag with an equals sign. Prior to PHP 5.4.0, this short syntax only works with the shortopentag configuration setting enabled. The major differences to print are that echo accepts an argument list and doesn't have a return value.

In PHP coding, Hello World is the first and the most common script used by developers when testing a new PHP environment.

The PHP Hello World code in a single line should be written as:

All PHP codes should be placed between the PHP opening and closing tags:

When including this PHP code in a document (e.g. a PHP file that is HTML-enabled) that can be opened in all web browsers:

Save the above script in a file named hello.php.

Upload the file on to the root folder/directory of your web hosting account (which may be WordPress installed on Siteground).

The file will print Hello World when it is opened through a web browser (such as Google Chrome).

Access the file on your web server through the web address (URL) of your website with the file name like this:

If you do not have a web server, but have set up PHP on a local computer, you can open the hello.php file with:

As you can see from the above demonstration, the PHP code must be placed inside the opening and closing PHP tags when it is within a HTML document.

PHP in HTML

Php Echo

PHP in HTML – The method (to use PHP and HTML in the same document) is useful when you have a lot of HTML code but you must also include some PHP codes in the same document. One example is when you create a HTML web page.

This is a document that we have illustrated from the first example.

HTML in PHP

This method is the opposite – You place HTML in PHP. This may not be a favorite method to many PHP developers, as the code seems much less readable.

PHP stands for Hypertext Preprocessor. It used to be Personal Home Page.

Php Echo Variables

PHP is open source and the use of PHP is free.

PHP code can be embedded into HTML, as demonstrated in the Hello World example.

PHP is a server-side scripting language that is interpreted on the server.

A scripting language is a set of instructions that is interpreted at runtime. A scripting language can be a server-side scripting language, or a client-side scripting language.

PHP can also contain other tags such as HTML or JavaScript (JS). JavaScript is a client-side scripting language that is interpreted by the client web browser (e.g. Google Chrome, Mozilla, Firefox, internet Explorer, etc).

What are the common file extensions of PHP?

Php
  • .php
  • .phps
  • .php3
  • .php4
  • .php5
  • .phtml

IDE Editors

It is the best practice to use an IDE editor when creating new or editing existing PHP codes or PHP files.

Sublime Text 3, GNU Emacs, PHPstorm, Visual Studio, Notepad++, etc are among some of the most commonly used and best code editors for PHP coding / PHP developers on Windows computers.

Textwrangler, VIM, Textmate, etc are available as some of the best code editors for Mac users.

Notepad

Notepad on Windows computers can be used to edit PHP files. All you need is to save the files in *.php extension.

Word Processor

Word processors (such as Windows Word) is not recommended for PHP code editing. PHP files that have been edited through most word processors will not be correctly executed by PHP.

Php Echo New Line

When running PHP on the command line, if you want to include another file which is in the same directory as the main script, doing just
<?php
include './otherfile.php';
?>
might not work, if you run your script like this:
/$ /path/to/script.php
because the current working dir will be set to '/', and the file '/otherfile.php' does not exist, because it is in '/path/to/otherfile.php'.
So, to get the directory in which the script resides, you can use this function:
<?php
function get_file_dir() {
global
$argv;
$dir = dirname(getcwd() . '/' . $argv[0]);
$curDir = getcwd();
chdir($dir);
$dir = getcwd();
chdir($curDir);
return
$dir;
}
?>
So you can use it like this:
<?php
include get_file_dir() . '/otherfile.php';
// or even.
chdir(get_file_dir());
include
'./otherfile.php';
?>
Spent some time thinking this one out, maybe it helps someone :)