engine improvements 100%+ performance gain on most real-world applications Lower memory usage, sometimes drastically lower Exceptions on Fatals method(); } call_method(null); ]]> getMessage()}\n"; } ]]> PHP 7 Exception Hierarchy |ab5c5c|Throwable| ➥ |ab5c5c|Exception| implements Throwable ➥ |ab5c5c|Error| implements Throwable ➥ |ab5c5c|TypeError| extends Error ➥ |ab5c5c|ParseError| extends Error Return Types Coercive Scalar Types Strict Scalar Types Anonymous Classes Coalesce Operator Spaceship Operator $b) ? 1 : 0); } function cmp_php7($a, $b) { return $a <=> $b; } ]]> Removal of many deprecated featuresBR/      (Your PHP4 code will break!) New reserved words: bool int float string null false true resource object mixed numeric 64-bit integer support on Windows Cleanup edge-case integer overflow/underflow Support for strings with length >= 2^31 bytes in 64 bit builds. Parse error on invalid numeric literals Uniform variable syntax $belongs_to['column'] // vs. $this->{$belongs_to['column']} // support missing combinations of operations $foo()['bar']() [$obj1, $obj2][0]->prop getStr(){0} // support nested :: $foo['bar']::$baz $foo::$bar::$baz $foo->bar()::baz() // support nested () foo()() $foo->bar()() Foo::bar()() $foo()() // support operations on arbitrary (...) expressions (...)['foo'] (...)->foo (...)->foo() (...)::$foo (...)::foo() (...)() // two more practical examples for the last point (function() { ... })() ($obj->closure)() // support all operations on dereferencable scalars // (not very useful) "string"->toLower() [$obj, 'method']() 'Foo'::$bar ]]> Unicode Codepoint Escape Syntax ICU IntlChar class added to intl extension CSPRNG