Php double colon vs arrow

In the sidebar of the php web manual, link text the addChild method uses the :: scope resolution operator, but in the example it uses the Arrow operator. Can anyone tell me why that is?

asked Oct 18, 2010 at 17:01

0

:: is for static elements while -> is for instance elements.

For example:

class Example {
  public static function hello(){
    echo 'hello';
  }
  public function world(){
    echo 'world';
  }
}

// Static method, can be called from the class name
Example::hello();

// Instance method, can only be called from an instance of the class
$obj = new Example();
$obj->world();

More about the static concept

Martin Bean

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answered Oct 18, 2010 at 17:07

wildpeakswildpeaks

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4

The arrow means the addChild is called as a member of the object (in this case $sxe).

The double colon means that addChild is a member of the SimpleXMLElement class.

answered Oct 18, 2010 at 17:06

This is just notation for the fact that its the method of an object and has nothing to do with actual usage.

In the case of documentation youre not dealing with an instance of an object like $object so the -> operator wouldnt be correct since you want to list the actual class name. So following the usage for a static method where the class name is static you use the scope res. operator ::...

This is generally how php documentation works for classes.

answered Oct 18, 2010 at 17:04

prodigitalsonprodigitalson

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In the sidebar of the php web manual, link text the addChild method uses the :: scope resolution operator, but in the example it uses the Arrow operator. Can anyone tell me why that is?

What is the use of :: in PHP?

In PHP, the double colon :: is defined as Scope Resolution Operator. It used when when we want to access constants, properties and methods defined at class level. When referring to these items outside class definition, name of class is used along with scope resolution operator.

What is the difference between -> and => in PHP?

Conclusion. The two operators, => and -> may look similar but are totally different in their usage. => is referred to as double arrow operator. It is an assignment operator used in associative arrays to assign values to the key-value pairs when creating arrays.

What is the arrow in PHP?

Arrow functions are introduced as an update in the PHP version 7.4. Arrow functions are supposed to be a more concise version of anonymous functions. Arrow functions can be seen as shorthand functions that automatically inherit the parent scope's variables.

What is double colon in laravel?

Simply it is token which allow access to static, constant and overridden properties of method of a class.

:: is for static elements while -> is for instance elements.

For example:

class Example {   public static function hello(){     echo 'hello';   }   public function world(){     echo 'world';   } }  // Static method, can be called from the class name Example::hello();  // Instance method, can only be called from an instance of the class $obj = new Example(); $obj->world(); 

More about the static concept

I know that there are two distinct ways to access methods in PHP.

$response->setParameter('foo', 'bar');

And.

sfConfig::set('foo', 'bar');

But what's the difference between them?

Jun 14 in PHP by narikkadan
• 16,080 points • 45 views

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What is the difference between double colon and arrow in PHP?

What does the :: mean in PHP?

What is an arrow in PHP?

Why does PHP use arrow?