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Migrating from PHP 7.2.x to PHP 7.3.x

Appendix Edit on GitHub ✎

This new minor version brings with it a number of new features and a few incompatibilities that should be tested for before switching PHP versions in production environments.

Seealso 7.0.x, 7.1.x and 7.2.x.

New-features New-functions Constants Incompatible Deprecated Other-changes Windows-support

In this section

Backward Incompatible Changes

Array accesses of type $obj["123"], where $obj implements ArrayAccess and "123" is an inte...

Deprecated Features

The declaration of case-insensitive constants has been deprecated. Passing true as the thi...

New Features

The closing marker for doc strings is no longer required to be followed by a semicolon or...

New Functions

array_key_first

New Global Constants

PASSWORD_ARGON2ID

Other Changes

setcookie and setrawcookie now also support the following signature: boolsetcookiestringna...

Windows Support

File descriptors are opened in shared read/write/delete mode by default. This effectively...

Source: appendices/migration73.xml · from the official PHP manual (php/doc-en)