{"id":1178,"date":"2015-12-24T00:05:31","date_gmt":"2015-12-23T23:05:31","guid":{"rendered":"https:\/\/vielhuber.de\/?p=1178"},"modified":"2016-06-05T22:59:03","modified_gmt":"2016-06-05T20:59:03","slug":"php-7-und-der-spaceship-operator","status":"publish","type":"post","link":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/","title":{"rendered":"PHP 7 und der Spaceship Operator"},"content":{"rendered":"

Neben neuen Features wie dem\u00a0Type Hinting f\u00fcr skalare Datentypen<\/a>\u00a0oder\u00a0der optimierten Performance<\/a>\u00a0bringt PHP 7 auch viele neue, n\u00fctzliche Spracherweiterungen mit sich. Dabei hat es nun auch endlich der \"Spaceship Operator\" in die Welt von PHP geschafft (Ruby- und Perl-Programmierer kennen den ja schon lange). \\($a <=> $b\\) gibt genau dann \\(0\\) zur\u00fcck, wenn beide Operanden gleich sind, \\(1\\), wenn der linke gr\u00f6\u00dfer ist und sonst \\(-1\\).<\/p>\n

<\/p>\n

Demnach entspricht dieser neue Operator der aus der Mathematik bekannten\u00a0Signumfunktion<\/a>\u00a0\\(sgn(x-y)\\).\u00a0Dadurch k\u00f6nnen auch\u00a0bereits existierende Vergleichsoperatoren mit Hilfe der neuen Syntax interpretiert werden:<\/p>\n\n\n\n\n\n\n\n\n
\\($a < $b\\)<\/td>\n\\(($a <=> $b) === -1\\)<\/td>\n<\/tr>\n
\\($a <= $b\\)<\/td>\n\\(($a <=> $b)\\) !\\(== 1\\)<\/td>\n<\/tr>\n
\\($a == $b\\)<\/td>\n\\(($a <=> $b) === 0\\)<\/td>\n<\/tr>\n
\\($a\\) !\\(= $b\\)<\/td>\n\\(($a <=> $b)\\) !\\(== 0\\)<\/td>\n<\/tr>\n
\\($a >= $b\\)<\/td>\n\\(($a <=> $b)\\) !\\(==\u00a0-1\\)<\/td>\n<\/tr>\n
\\($a > $b\\)<\/td>\n\\(($a <=> $b) === 1\\)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Damit gelten dieselben Regeln<\/a> wie f\u00fcr die Vergleichsoperatoren (so ist z.B. \\([1,2,3] <=>[1,2,1]\\) gleich \\(1\\)).<\/p>\n","protected":false},"excerpt":{"rendered":"

Neben neuen Features wie dem\u00a0Type Hinting f\u00fcr skalare Datentypen\u00a0oder\u00a0der optimierten Performance\u00a0bringt PHP 7 auch viele neue, n\u00fctzliche Spracherweiterungen mit sich. Dabei hat es nun auch endlich der \"Spaceship Operator\" in die Welt von PHP geschafft (Ruby- und Perl-Programmierer kennen den ja schon lange). \\($a <=> $b\\) gibt genau dann \\(0\\) zur\u00fcck, wenn beide Operanden gleich […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"gtbabel_prevent_lngs":"","gtbabel_alt_lng":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-1178","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-blog"},"acf":[],"yoast_head":"PHP 7 und der Spaceship Operator < Vielhuber David<\/title>\n<meta name=\"description\" content=\"Neben neuen Features wie dem\u00a0Type Hinting f\u00fcr skalare Datentypen\u00a0oder\u00a0der optimierten Performance\u00a0bringt PHP 7 auch viele neue, n\u00fctzliche\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP 7 und der Spaceship Operator < Vielhuber David\" \/>\n<meta property=\"og:description\" content=\"Neben neuen Features wie dem\u00a0Type Hinting f\u00fcr skalare Datentypen\u00a0oder\u00a0der optimierten Performance\u00a0bringt PHP 7 auch viele neue, n\u00fctzliche\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/\" \/>\n<meta property=\"og:site_name\" content=\"Vielhuber David\" \/>\n<meta property=\"article:published_time\" content=\"2015-12-23T23:05:31+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2016-06-05T20:59:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/vielhuber.de\/wp-content\/uploads\/about.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"552\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"David\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@vielhuber\" \/>\n<meta name=\"twitter:site\" content=\"@vielhuber\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"David\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u00a0Minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/vielhuber.de\\\/blog\\\/php-7-und-der-spaceship-operator\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/vielhuber.de\\\/blog\\\/php-7-und-der-spaceship-operator\\\/\"},\"author\":{\"name\":\"David\",\"@id\":\"https:\\\/\\\/vielhuber.de\\\/#\\\/schema\\\/person\\\/64d4ff14713d413ea4d9b210d0c2c6ef\"},\"headline\":\"PHP 7 und der Spaceship Operator\",\"datePublished\":\"2015-12-23T23:05:31+00:00\",\"dateModified\":\"2016-06-05T20:59:03+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/vielhuber.de\\\/blog\\\/php-7-und-der-spaceship-operator\\\/\"},\"wordCount\":161,\"publisher\":{\"@id\":\"https:\\\/\\\/vielhuber.de\\\/#\\\/schema\\\/person\\\/64d4ff14713d413ea4d9b210d0c2c6ef\"},\"articleSection\":[\"Blog\"],\"inLanguage\":\"de\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/vielhuber.de\\\/blog\\\/php-7-und-der-spaceship-operator\\\/\",\"url\":\"https:\\\/\\\/vielhuber.de\\\/blog\\\/php-7-und-der-spaceship-operator\\\/\",\"name\":\"PHP 7 und der Spaceship Operator < Vielhuber David\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/vielhuber.de\\\/#website\"},\"datePublished\":\"2015-12-23T23:05:31+00:00\",\"dateModified\":\"2016-06-05T20:59:03+00:00\",\"description\":\"Neben neuen Features wie dem\u00a0Type Hinting f\u00fcr skalare Datentypen\u00a0oder\u00a0der optimierten Performance\u00a0bringt PHP 7 auch viele neue, n\u00fctzliche\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/vielhuber.de\\\/blog\\\/php-7-und-der-spaceship-operator\\\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/vielhuber.de\\\/blog\\\/php-7-und-der-spaceship-operator\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/vielhuber.de\\\/blog\\\/php-7-und-der-spaceship-operator\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/vielhuber.de\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PHP 7 und der Spaceship Operator\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/vielhuber.de\\\/#website\",\"url\":\"https:\\\/\\\/vielhuber.de\\\/\",\"name\":\"Vielhuber David\",\"description\":\"Full-Stack Developer\",\"publisher\":{\"@id\":\"https:\\\/\\\/vielhuber.de\\\/#\\\/schema\\\/person\\\/64d4ff14713d413ea4d9b210d0c2c6ef\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/vielhuber.de\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\\\/\\\/vielhuber.de\\\/#\\\/schema\\\/person\\\/64d4ff14713d413ea4d9b210d0c2c6ef\",\"name\":\"David\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/vielhuber.de\\\/wp-content\\\/uploads\\\/about.jpg\",\"url\":\"https:\\\/\\\/vielhuber.de\\\/wp-content\\\/uploads\\\/about.jpg\",\"contentUrl\":\"https:\\\/\\\/vielhuber.de\\\/wp-content\\\/uploads\\\/about.jpg\",\"width\":700,\"height\":552,\"caption\":\"David\"},\"logo\":{\"@id\":\"https:\\\/\\\/vielhuber.de\\\/wp-content\\\/uploads\\\/about.jpg\"},\"sameAs\":[\"https:\\\/\\\/x.com\\\/vielhuber\"]}]}<\/script>","yoast_head_json":{"title":"PHP 7 und der Spaceship Operator < Vielhuber David","description":"Neben neuen Features wie dem\u00a0Type Hinting f\u00fcr skalare Datentypen\u00a0oder\u00a0der optimierten Performance\u00a0bringt PHP 7 auch viele neue, n\u00fctzliche","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/","og_locale":"de_DE","og_type":"article","og_title":"PHP 7 und der Spaceship Operator < Vielhuber David","og_description":"Neben neuen Features wie dem\u00a0Type Hinting f\u00fcr skalare Datentypen\u00a0oder\u00a0der optimierten Performance\u00a0bringt PHP 7 auch viele neue, n\u00fctzliche","og_url":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/","og_site_name":"Vielhuber David","article_published_time":"2015-12-23T23:05:31+00:00","article_modified_time":"2016-06-05T20:59:03+00:00","og_image":[{"width":700,"height":552,"url":"https:\/\/vielhuber.de\/wp-content\/uploads\/about.jpg","type":"image\/jpeg"}],"author":"David","twitter_card":"summary_large_image","twitter_creator":"@vielhuber","twitter_site":"@vielhuber","twitter_misc":{"Verfasst von":"David","Gesch\u00e4tzte Lesezeit":"1\u00a0Minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/#article","isPartOf":{"@id":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/"},"author":{"name":"David","@id":"https:\/\/vielhuber.de\/#\/schema\/person\/64d4ff14713d413ea4d9b210d0c2c6ef"},"headline":"PHP 7 und der Spaceship Operator","datePublished":"2015-12-23T23:05:31+00:00","dateModified":"2016-06-05T20:59:03+00:00","mainEntityOfPage":{"@id":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/"},"wordCount":161,"publisher":{"@id":"https:\/\/vielhuber.de\/#\/schema\/person\/64d4ff14713d413ea4d9b210d0c2c6ef"},"articleSection":["Blog"],"inLanguage":"de"},{"@type":"WebPage","@id":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/","url":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/","name":"PHP 7 und der Spaceship Operator < Vielhuber David","isPartOf":{"@id":"https:\/\/vielhuber.de\/#website"},"datePublished":"2015-12-23T23:05:31+00:00","dateModified":"2016-06-05T20:59:03+00:00","description":"Neben neuen Features wie dem\u00a0Type Hinting f\u00fcr skalare Datentypen\u00a0oder\u00a0der optimierten Performance\u00a0bringt PHP 7 auch viele neue, n\u00fctzliche","breadcrumb":{"@id":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/#breadcrumb"},"inLanguage":"de","potentialAction":[{"@type":"ReadAction","target":["https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/vielhuber.de\/blog\/php-7-und-der-spaceship-operator\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/vielhuber.de\/"},{"@type":"ListItem","position":2,"name":"PHP 7 und der Spaceship Operator"}]},{"@type":"WebSite","@id":"https:\/\/vielhuber.de\/#website","url":"https:\/\/vielhuber.de\/","name":"Vielhuber David","description":"Full-Stack Developer","publisher":{"@id":"https:\/\/vielhuber.de\/#\/schema\/person\/64d4ff14713d413ea4d9b210d0c2c6ef"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/vielhuber.de\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"},{"@type":["Person","Organization"],"@id":"https:\/\/vielhuber.de\/#\/schema\/person\/64d4ff14713d413ea4d9b210d0c2c6ef","name":"David","image":{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/vielhuber.de\/wp-content\/uploads\/about.jpg","url":"https:\/\/vielhuber.de\/wp-content\/uploads\/about.jpg","contentUrl":"https:\/\/vielhuber.de\/wp-content\/uploads\/about.jpg","width":700,"height":552,"caption":"David"},"logo":{"@id":"https:\/\/vielhuber.de\/wp-content\/uploads\/about.jpg"},"sameAs":["https:\/\/x.com\/vielhuber"]}]}},"_links":{"self":[{"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/posts\/1178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/comments?post=1178"}],"version-history":[{"count":1,"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/posts\/1178\/revisions"}],"predecessor-version":[{"id":1285,"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/posts\/1178\/revisions\/1285"}],"wp:attachment":[{"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/media?parent=1178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/categories?post=1178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vielhuber.de\/bn\/wp-json\/wp\/v2\/tags?post=1178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}