Like all major revolutions throughout history, the PHP 7 revolution will also be spilling some blood before producing something awesome. PHP 7 is the future of PHP and all the applications will need to upgrade to PHP 7 sooner or later. This issue has been resolved in PHP 7 and it allows seamless execution of a variety of tasks. Simultaneously performing several activities was difficult. To expedite the execution time, anonymous class is used. Handling of fatal errors is quite simple. Handling of fatal errors is a bit challenging. Having a 64-bit support, it enables the programmer to use native 64-bit integers and large files. Let us look at more differences between PHP 5 and 7 in the below table – S.NoĦ4-bit integers as well as large files are not supported as it do not have 64-bit support. If anyone has functions like “ereg” and “mysql” buried deep inside their code base, they are gonna strike a Backward Compatibility wall as these functions are deprecated and, it is going to be a real pain in the behind to upgrade.A lot of extensions are not ready yet for PHP 7.While there is no major downside to it, but to just point out, here is a list of some: Deprecation of mysql_* functions: PHP 7 has deprecated all mysql_* functions, now developers have to use mysqli (the intelligent version of MySQL) instead.Unicode Codepoint Escape Syntax : PHP 7 introduced syntax to escape Unicode codepoint as below :Įcho “\u Reverse “ // This outputs : esreveR.Null Coalesce Operator:The coalesce operator (?) returns result of its first operand if it exists, or null if it doesn’t.It can be mostly used in sorting and combined comparison. Spaceship Operator: As the name suggests, the spaceship operator introduced is certainly from a different world.This has somewhat been taken care of in PHP 7 where you will be able to declare what type of value will be returned. Return Type: Developers have been raising their eyebrows over not being able to declare a return type for their function.Hence, PHP 7 is often termed PHPNG (PHP – Next Gen) taking the performance of your code to a whole new level. Performance: As per Zend Technologies, the performance improvement is huge!! Just upgrading to PHP 7 gives enormous performance upgrades.Software Engineering Interview Questions.Top 10 System Design Interview Questions and Answers.Top 20 Puzzles Commonly Asked During SDE Interviews.Commonly Asked Data Structure Interview Questions.Top 10 algorithms in Interview Questions.Top 20 Dynamic Programming Interview Questions.Top 20 Hashing Technique based Interview Questions. Top 50 Dynamic Programming (DP) Problems.Top 20 Greedy Algorithms Interview Questions.Top 100 DSA Interview Questions Topic-wise.
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