Essential PHP 7 - Speaker Deck

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Juliette Reinders Folmer @jrf_nl NijmegenPHP May 2016 Essential PHP 7

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Who Am I? Self-employed, Independent Consultant Creator PHPCheatsheets phpcheatsheets.com Avid open source contributor

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What Happened to PHP 6 ? • Unicode – ICU • Publications

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How Fast ?!?!?

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How Fast ?!?!?

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How Fast ?!?!?

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What Can You Expect ? New features! Less BC breaks than upgrading to 5.4! PHPNG (PHP Next-Gen) Speed !

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Version Support

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What has changed ?

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So Long And Thanks For All The Fish MySql extension Ereg Posix Regex PHP 5.4 and lower

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• dl() on fpm-fcgi • set_magic_quotes_runtime() • set_socket_blocking() • mcrypt_generic_end() • mcrypt_ecb() • mcrypt_cnc() • mcrypt_cfb() • datefmt_set_timezone_id • IntlDateFormatter::setTimeZoneID • call_user_method() • call_user_method_array() Removed Functions

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• xsl.security_prefs • Input encoding: – iconv.input_encoding – Iconv.internal_encoding – mbstring.http_input – mbstring.http_output – mbstring.internal_encoding Removed ini Options

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What Will Break ? preg_replace /e Static vs $this new ... by reference Multiple default: Division by zero Numeric Hex strings Some Variable Variables Alternative PHP tags

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What Will Break ? func_get_ args() Reserved words PHP4 construc- tors $HTTP_ RAW_ POST_ DATA Invalid octal literals list() vs string access Internal array pointer vs foreach() Redefining function args

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Being Forward Compatible can be as Important as Being Backwards Compatible

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Cross-version bootstrap.php version_compare() function_exists() class_exists() method_exists() defined()  class-php53-code.php  class-php70-code.php  class-php-compat.php

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Goodies! Spaceship Unicode Escapes Strict Typing More Exception Types More Catchable Errors Uniform Variable Syntax Null Coalesce Scalar Type Hints & Return Type Hints

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Uniform Variable Syntax Syntax Old Interpretation New Interpretation $$var[‘key1’][‘key2’] ${$var[‘key1’][‘key2’]} ($$var)[‘key1’][‘key2’] $var->$prop[‘key’] $var->{$prop[‘key’]} ($var->$prop)[‘key’] $var->$prop[‘key’]() $var->{$prop[‘key’]}() ($var->$prop)[‘key’]() Class::$var[‘key’]() Class::{$var[‘key’]}() (Class::$var)[‘key’]()

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Combined Comparison Operator $b ) ? 1 : 0 ); } // PHP7+ function sort_order( $a, $b ) { return $a <=> $b; }

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Unicode Codepoint Escape Syntax

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Null Coalesce Operator // Pre PHP 7 $post = ( ( isset( $post ) ? $post : ‘default’ ); // PHP7+ $post = $post ?? ‘default’; // PHP 7.1+ $post ??= ‘default’;

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Scalar Type Hints

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Scalar Type Hints & Strict Typing

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Return Type Hints post_type ); }

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More Goodies! Session options Preg_ replace_ callback_ array() intdiv() Expectations Closure call() Filtered unserialize() Exceptions on Fatals IntlChar Class

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PHP5.3+ on Steriods Bind Closure on Call Group Use Declarations Anonymous Classes Generator Enhancements Assertions

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• Are the PHP Extensions Ready ? – http://gophp7.org/ – https://github.com/gophp7/gophp7-ext/wiki/extensions- catalog • PHP 7 Compatibility Checker – https://github.com/sstalle/php7cc • PHP Compatibility – https://github.com/wimg/PHPCompatibility/ • Need a Dev Box ? – https://github.com/rlerdorf/php7dev • PHP 7 to PHP 5.6 transphiler – https://github.com/jaytaph/Transphpile Useful

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Slides will be posted to http://speakerdeck.com/jrf Thank you ! Essential PHP 7