PHP7 Change Introduction

This article is based on the new files when PHP was released, link address: PHP 7 new

Features at a glance

• Added?? operator
• Added <=> Operato
  New operator

php//PHP 7: Compare the size of two numbers function Order_func ($a, $b) {    return ($a < $b)? 1: (($a > $b)? 1:0);} PHP new operator <=>,perfectfunction Order_func ($a, $b) {    return $a <=> $b;}

• Added \u{xxxxx} Unicode codepoint Escape Syntax
  You can output Unicode characters directly using this method

Phpecho "\u{1f602}"; Outputs                 

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