What makes PHP 7 much faster than PHP 5 ? What are the advantages of PHP 7 ?
Released towards the end of 2015, PHP 7 is the first major PHP release in more than 10 years and skips PHP 6 to provide a more modern update. Some of its most beneficial features are as follows.
Benchmark-Breaking Performance - 10 years is not a lot of time for big things, but when we look at it from an internet perspective, we see that it occupies a lot of space in this time frame. PHP has been reconfigured to not only reduce memory consumption but also increase performance. We can see that sites using PHP 7 are running faster than ever (and in most cases twice as fast).
Understandable Variable Syntax - In earlier versions of PHP, some variable-variable expressions that needed to work were classified as invalid. PHP developers made it even more consistent by developing more variable alternatives.
Spaceship Operator - Also considered as Compound Comparison Operator or Three Way Comparison operator. This operator’s icon <=> is named Spaceship Operator because it looks like a spaceship in a simple sense. This operator returns 0 if the two values are equal, 1 if the left one is greater, and -1 if the right one is greater. This operator is already available in Perl and Ruby under the name directional comparison.
CSPRNG (Cryptographically Secure Pseudo-Random Number Generator) - This function has a different use for PHP 7: a random number generator that facilitates the generation of passwords or complex passwords. You can browse through the random_int and random_bytes functions.
Scalar Type Hints - This feature has already been available in PHP for over 10 years. (For example: defining classes and arrays) New ones were added with PHP 7: int, float, string, bool. This feature, as in other programming languages, gives the opportunity to create variables according to specified types, assign values and catch errors according to these types.
Anonymous Classes - Allows users to create objects without having to name them. Generally speaking, it is ideal for one-off object uses. For more information, you can take a look at PHP’s explanation on its site. http://php.net/manual/tr/language.oop5.anonymous.php
Return Type Declarations - Code is often better when it’s easy to read. These new type definitions that come with PHP 7 not only make the code easier to read, but also allow returning the desired data type to be given as a result of the function. You can examine the new usage by looking at the example below. The key point here is to specify the type to be returned by placing the: sign right after the name of the function.