What are the common pitfalls when migrating from PHP 5.x to PHP 7?

One common pitfall when migrating from PHP 5.x to PHP 7 is the removal of deprecated features and changes in syntax. To solve this issue, developers need to review their codebase for any deprecated functions or syntax and update them accordingly. Additionally, they should make sure that all third-party libraries and frameworks are compatible with PHP 7. 

// Before PHP 7
mysql_connect("localhost", "username", "password");

// After PHP 7
mysqli_connect("localhost", "username", "password");

Keywords

backward incompatible changes deprecated features scalar type declarations return type declarations error handling improvements

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