{"id":106,"date":"2021-10-06T07:04:00","date_gmt":"2021-10-06T07:04:00","guid":{"rendered":"https:\/\/webdevs.blog\/pl\/?p=106"},"modified":"2026-02-20T07:28:18","modified_gmt":"2026-02-20T07:28:18","slug":"memcached-vs-wp-transient-vs-wp-postmeta-api","status":"publish","type":"post","link":"https:\/\/webdevs.blog\/pl\/memcached-vs-wp-transient-vs-wp-postmeta-api\/","title":{"rendered":"Memcached vs wp transient vs wp postmeta api"},"content":{"rendered":"\n<p>W tym wpisie por\u00f3wnamy w skr\u00f3cie trzy tytu\u0142owe rozwi\u0105zania &#8211; dzi\u0119ki temu b\u0119dziecie mogli dobra\u0107 odpowiednie rozwi\u0105zanie do problemu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Memcached<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>memcached jest zazwyczaj zainstalowany na serwerze (przez hostingodawc\u0119), nie wymaga WP &#8211; zwi\u0105zany jest z samym PHPem<\/li>\n\n\n\n<li>memcach<strong>e<\/strong> <strong>\u2260<\/strong> memcach<strong>ed<\/strong> &#8211; u\u017cywajcie memcach<strong>ed<\/strong> bo jest nowsze i og\u00f3lnie to rozwini\u0119cie\/kontynuacja wersji bez &#8222;d&#8221;<\/li>\n\n\n\n<li>memcached <strong>nie<\/strong> zapewnia \u017ce dana zmienna b\u0119dzie dost\u0119pna przez ca\u0142y &#8222;expiration time&#8221; &#8211; je\u015bli braknie miejsca na nowe zmienne (klucze) to usuwane s\u0105 <a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/memcached\/memcached\/wiki\/UserInternals#when-are-itemsevicted\" target=\"_blank\">najpierw przeterminowane, je\u015bli takich nie ma to usuwany jest ten kt\u00f3ry nie by\u0142 najd\u0142u\u017cej u\u017cywany<\/a><\/li>\n\n\n\n<li>je\u015bli &#8222;expiration time&#8221; jest wi\u0119kszy ni\u017c 30 dni (w sekundach) wtedy podana warto\u015b\u0107 uznawana jest za UNIX time i o tym czasie b\u0119dzie &#8222;expired&#8221;<\/li>\n\n\n\n<li>uruchamianie memcached na localu (Mac, terminal):\n<ul class=\"wp-block-list\">\n<li><code>memcached -d<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>example.php:<\/li>\n<\/ul>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">$key = <span class=\"hljs-string\">'siemka'<\/span>;\n$value = <span class=\"hljs-string\">'uszanowanko'<\/span>;\n$expiration = <span class=\"hljs-number\">5<\/span>; <span class=\"hljs-comment\">\/\/ 5 seconds max lifetime<\/span>\n\n$mc = <span class=\"hljs-keyword\">new<\/span> Memcached();\n$mc-&gt;addServer(<span class=\"hljs-string\">'127.0.0.1'<\/span>, <span class=\"hljs-number\">11211<\/span>);\n\n$val = $mc-&gt;get($key);\nvar_dump($val); <span class=\"hljs-comment\">\/\/ false or $value if not after expiration time<\/span>\n\n<span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-keyword\">empty<\/span>($val)) {\n $mc-&gt;set($key, $value, $expiration);\n}\n\n$val = $mc-&gt;get($key);\nvar_dump($val); <span class=\"hljs-comment\">\/\/ $value<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\"><a href=\"https:\/\/developer.wordpress.org\/apis\/handbook\/transients\/\" target=\"_blank\" rel=\"noreferrer noopener\">Transienty<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>transient <strong>NIE<\/strong> gwarantuje \u017ce przez X czasu b\u0119dzie dost\u0119pny tylko, \u017ce po X czasu b\u0119dzie ju\u017c usuni\u0119ty <strong>ale<\/strong> mo\u017ce by\u0107 usuni\u0119ty wcze\u015bniej (np. przy aktualizacjach)<\/li>\n\n\n\n<li>example.php:<\/li>\n<\/ul>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">require<\/span> <span class=\"hljs-string\">\"wp-load.php\"<\/span>;\n\n$transient = <span class=\"hljs-string\">'test'<\/span>;\n$value = <span class=\"hljs-string\">'siemka'<\/span>;\n$expiration = <span class=\"hljs-number\">5<\/span>; <span class=\"hljs-comment\">\/\/ 5 seconds max lifetime;<\/span>\n\n$val = get_transient($transient);\nvar_dump($val); <span class=\"hljs-comment\">\/\/false (no transient) or $value if script was run less than $expiration seconds ago<\/span>\nvar_dump(set_transient($transient, $value, $expiration));\n$val = get_transient($transient);\nvar_dump($val); <span class=\"hljs-comment\">\/\/ $value<\/span>\nvar_dump(delete_transient($transient));\n$val = get_transient($transient); <span class=\"hljs-comment\">\/\/false - no trasient<\/span>\nvar_dump($val);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\">Postmeta<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>sami musimy zarz\u0105dza\u0107 usuwaniem ale za to mamy (w\u0142asn\u0105) gwarancj\u0119 \u017ce dane tam b\u0119d\u0105 tak d\u0142ugo<br>jak chcemy<\/li>\n\n\n\n<li>musimy \u201cteoretycznie\u201d dodawa\u0107 meta dla jakiego\u015b id z drugiej strony ten id nie musi istnie\u0107 ?<\/li>\n\n\n\n<li>example.php:<\/li>\n<\/ul>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">require<\/span> <span class=\"hljs-string\">\"wp-load.php\"<\/span>;\n\n$field_name = <span class=\"hljs-string\">'test'<\/span>;\n$post_id = <span class=\"hljs-number\">1<\/span>;\n$value = <span class=\"hljs-string\">'siemka'<\/span>;\n\n$val = get_post_meta($post_id , $field_name, <span class=\"hljs-keyword\">false<\/span>);\nvar_dump($val);\n$update = update_post_meta($post_id , $field_name, $value);\nvar_dump($update);\n$val = get_post_meta($post_id , $field_name, <span class=\"hljs-keyword\">false<\/span>);\nvar_dump($val);\nvar_dump(delete_post_meta($post_id , $field_name));\n$val = get_post_meta($post_id , $field_name, <span class=\"hljs-keyword\">false<\/span>);\nvar_dump($val);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n","protected":false},"excerpt":{"rendered":"<p>W tym wpisie por\u00f3wnamy w skr\u00f3cie trzy tytu\u0142owe rozwi\u0105zania &#8211; dzi\u0119ki temu b\u0119dziecie mogli dobra\u0107 odpowiednie rozwi\u0105zanie do problemu. Memcached Transienty Postmeta<\/p>\n","protected":false},"author":9,"featured_media":231,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,4],"tags":[66,68,67],"class_list":["post-106","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","category-web-development","tag-memcached","tag-wp-postmeta-api","tag-wp-transient"],"_links":{"self":[{"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/posts\/106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/comments?post=106"}],"version-history":[{"count":4,"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/posts\/106\/revisions"}],"predecessor-version":[{"id":698,"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/posts\/106\/revisions\/698"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/media\/231"}],"wp:attachment":[{"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/media?parent=106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/categories?post=106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webdevs.blog\/pl\/wp-json\/wp\/v2\/tags?post=106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}