Php which

The variable's value can not be a keyword e. Paamayim Nekudotayim would, at first, seem like a strange choice for naming a double-colon. However, while writing the Zend Engine 0. It actually does mean double-colon - in Hebrew! Three special keywords self , parent and static are used to access properties or methods from inside the class definition. When an extending class overrides the parents definition of a method, PHP will not call the parent's method.

It's up to the extended class on whether or not the parent's method is called. This also applies to Constructors and Destructors , Overloading , and Magic method definitions. See also some examples of static call trickery.

Static Keyword ». Submit a Pull Request Report a Bug. If you have 2 versions of the php executable then this will help you. If they are the same version then it wont really matter which one is who:. If you want to find out the php version, then php -v will print the php version in the CLI and any Zend modules installed.

If you want to find out the ini files included then php --ini will display th list of ini files loaded by the php module this applies for the CLI version. If this doesn't work, it could be because this function is disabled in the php. This is often done for security. If this is the case, you will have a line in your php. PHP 5. The locations you mentionend in your question are command line script interpreters that would be called by shebang notation like.

Neither one of those is used if you use PHP via the Apache module. If you use the CGI-Version of php it should show up in the phpinfo ; output. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Thus, the benefit of this guide is not in the rules themselves but the sharing of those rules. PSR-2 was accepted in and since then a number of changes have been made to PHP which has implications for coding style guidelines. Whilst PSR-2 is very comprehensive of PHP functionality that existed at the time of writing, new functionality is very open to interpretation.

Throughout this document, any instructions MAY be ignored if they do not exist in versions of PHP supported by your project. Blank lines MAY be added to improve readability and to indicate related blocks of code except where explicitly forbidden. Short form of type keywords MUST be used i. The header of a PHP file may consist of a number of different blocks. Each block MUST be in the order listed below, although blocks that are not relevant may be omitted.

Import statements MUST never begin with a leading backslash as they must always be fully qualified. Therefore the following is the maximum compounding depth allowed:. When wishing to declare strict types in files containing markup outside PHP opening and closing tags, the declaration MUST be on the first line of the file and include an opening PHP tag, the strict types declaration and closing tag.

Block declare statements are allowed and MUST be formatted as below. Note position of braces and spacing:. When instantiating a new class, parentheses MUST always be present even when there are no arguments passed to the constructor. The extends and implements keywords MUST be declared on the same line as the class name. Lists of implements and, in the case of interfaces, extends MAY be split across multiple lines, where each subsequent line is indented once.

The use keyword used inside the classes to implement traits MUST be declared on the next line after the opening brace. When the class has nothing after the use import statement, the class closing brace MUST be on the next line after the use import statement.

When using the insteadof and as operators they must be used as follows taking note of indentation, spacing, and new lines. That is, an underscore prefix explicitly has no meaning. A method declaration looks like the following. In the following example we try to send both a number and a string to the function, but here we have added the strict declaration:. The strict declaration forces things to be used in the intended way.

The following example shows how to use a default parameter. If we call the function setHeight without arguments it takes the default value as argument:. PHP 7 also supports Type Declarations for the return statement. Like with the type declaration for function arguments, by enabling the strict requirement, it will throw a "Fatal Error" on a type mismatch.

You can specify a different return type, than the argument types, but make sure the return is the correct type:. In PHP, arguments are usually passed by value, which means that a copy of the value is used in the function and the variable that was passed into the function cannot be changed.

When a function argument is passed by reference, changes to the argument also change the variable that was passed in. We just launched W3Schools videos.