{"id":28122,"date":"2018-10-27T13:00:54","date_gmt":"2018-10-27T13:00:54","guid":{"rendered":"https:\/\/www.knowband.com\/blog\/?p=22248\/"},"modified":"2020-11-11T18:04:36","modified_gmt":"2018-10-31T11:20:02","slug":"how-to-read-the-file-in-php-language","status":"publish","type":"post","link":"https:\/\/www.knowband.com\/blog\/pl\/bez-kategorii\/how-to-read-the-file-in-php-language\/","title":{"rendered":"How to read the file in PHP language?"},"content":{"rendered":"<h2>Cel bloga<\/h2>\n<p>Po przeczytaniu tego bloga b\u0119dziesz m\u00f3g\u0142 odczyta\u0107 plik w j\u0119zyku PHP. W blogu otrzymasz wystarczaj\u0105c\u0105 ilo\u015b\u0107 informacji na temat innego sposobu wykorzystywania w PHP do odczytu pliku.<\/p>\n<h2>Dowiedzmy si\u0119 o metodzie czytania plik\u00f3w w PHP<\/h2>\n<p>PHP udost\u0119pnia r\u00f3\u017cne metody odczytu pliku w nast\u0119puj\u0105cy spos\u00f3b:<\/p>\n<h3>Tradycyjne metody<\/h3>\n<p>W tego typu metodzie czytania pliku musimy wykona\u0107 krok 3.<\/p>\n<ol>\n<li>Otw\u00f3rz plik.<\/li>\n<li>Przeczytaj plik.<\/li>\n<li>Zamknij plik.<\/li>\n<\/ol>\n<p>Zobaczmy kilka tradycyjnych metod:<\/p>\n<h3>fopen ():<\/h3>\n<p>Aby odczyta\u0107 plik, musimy otworzy\u0107 plik za pomoc\u0105<\/p>\n<pre class=\"brush: php; gutter: true\">$ file = fopen (&quot;test.txt&quot;,<\/pre>\n<h3>feof ()<\/h3>\n<p>Ta metoda sprawdza, czy ju\u017c przeczyta\u0142e\u015b do ko\u0144ca pliku. Zwraca true, dop\u00f3ki ostatnia linia pliku nie zostanie odczytana, a kiedy przekroczymy ostatni\u0105 lini\u0119, zwraca false. U\u017cywamy tej metody w p\u0119tli, aby odczyta\u0107 plik z pierwszej linii do ostatniej linii.<\/p>\n<pre class=\"brush: php; gutter: true\">$ file = fopen (&quot;test.txt&quot;,<\/pre>\n<h3>fclose ()<\/h3>\n<p>U\u017cywamy tej metody, aby zamkn\u0105\u0107 plik po przeczytaniu pliku. Po zamkni\u0119ciu pliku nie b\u0119dziemy ju\u017c mogli odczyta\u0107 tego pliku.<\/p>\n<pre class=\"brush: php; gutter: true\">$ file = fopen (&quot;test.txt&quot;,<\/pre>\n<h3>fgets ()<\/h3>\n<p>Korzystamy z tej metody, aby odczyta\u0107 wiersz pliku po linii. Zbiera on pojedynczy wiersz danych z pliku i zwraca go jako ci\u0105g. A stamt\u0105d mo\u017cesz wydrukowa\u0107 lini\u0119 lub mo\u017cesz przetworzy\u0107 t\u0119 sam\u0105 lini\u0119 zgodnie z wymaganiami.<\/p>\n<pre class=\"brush: php; gutter: true\">&lt;? php $ file = fopen (&quot;test.txt&quot;,<\/pre>\n<h3>fread ()<\/h3>\n<p>U\u017cywamy tej metody, je\u015bli chcemy odczyta\u0107 plik w ograniczonym rozmiarze. W tej metodzie musimy przekaza\u0107 limit rozmiaru w bajtach, a nast\u0119pnie ta metoda odczytuje plik do okre\u015blonego limitu rozmiaru i ignoruje<\/p>\n<pre class=\"brush: php; gutter: true\">$ file = fopen (&quot;test.txt&quot;,<\/pre>\n<p><strong>Uwaga: <\/strong>Bez wzgl\u0119du na podan\u0105 liczb\u0119, fread nie b\u0119dzie czyta\u0142 wi\u0119cej ni\u017c 8,192 bajt\u00f3w (8 KB). Zak\u0142adaj\u0105c, \u017ce plik nie jest wi\u0119kszy ni\u017c 8 KB, poni\u017cszy kod powinien odczytywa\u0107 ca\u0142y plik w \u0142a\u0144cuch.<\/p>\n<pre class=\"brush: php; gutter: true\">&lt;? php $ file = fopen (&quot;test.txt&quot;,<\/pre>\n<h3>fgetss ()<\/h3>\n<p>Ta funkcja jest podobna do funkcji fgets (), ale usuwa wszystkie znalezione znaczniki HTML lub PHP, pozostawiaj\u0105c tylko zwyk\u0142y tekst. Kod:<\/p>\n<pre class=\"brush: php; gutter: true\">&lt;? php $ file_handle = fopen (&quot;test.txt&quot;, &quot;r&quot;); while (! feof ($ file_handle)) {echo fgetss ($ file_handle); } fclose ($ file_handle); ?&gt;<\/pre>\n<p><strong>test.txt<\/strong><\/p>\n<pre class=\"brush: html; gutter: true\">&lt;html&gt; &lt;head&gt; &lt;title&gt; &lt;\/title&gt; &lt;\/head&gt; &lt;body&gt; &lt;div class = &quot;editor-content&quot; style = &quot;text-align: left&quot;&gt; &lt;p&gt; Knowband to jedna z wiod\u0105cych nazw jak firma zajmuj\u0105ca si\u0119 rozwojem i marketingiem wtyczek e-commerce. &lt;\/p&gt; &lt;p&gt;<\/pre>\n<p><strong>Wyj\u015bcie:<\/strong><\/p>\n<p>Knowband to jedna z wiod\u0105cych firm zajmuj\u0105cych si\u0119 tworzeniem wtyczek do e-commerce i marketingiem. Nasz zesp\u00f3\u0142 wysoko wykwalifikowanych i do\u015bwiadczonych specjalist\u00f3w IT.<\/p>\n<h2>Inne metody<\/h2>\n<p>PHP zapewnia r\u00f3wnie\u017c r\u00f3\u017cne inne metody obs\u0142ugi plik\u00f3w, kt\u00f3re mo\u017cemy wykorzysta\u0107 do r\u00f3\u017cnych cel\u00f3w.<\/p>\n<h3>file_get_contents ()<\/h3>\n<p>Ta metoda mo\u017ce by\u0107 u\u017cyta do zebrania wszystkich danych z pliku jako \u0142a\u0144cucha. Na przyk\u0142ad, w jaki spos\u00f3b mo\u017cemy zebra\u0107 wszystkie dane z naszej strony internetowej? Widzia\u0142e\u015b<\/p>\n<pre class=\"brush: php; gutter: true\">&lt;? php $ file = file_get_contents (&quot;https:\/\/www.knowband.com\/&quot;); echo $ plik; ?&gt;<\/pre>\n<h3>readfile ()<\/h3>\n<p>Funkcja readfile zrzuca ca\u0142\u0105 zawarto\u015b\u0107 pliku lub strony sieci Web do domy\u015blnego bufora wyj\u015bciowego. Domy\u015blnie to polecenie wy\u015bwietla komunikat o b\u0142\u0119dzie, je\u015bli si\u0119 nie powiedzie. Aby unikn\u0105\u0107 tego zachowania, korzystamy z @readfile (). Zobaczmy r\u00f3\u017cnic\u0119 mi\u0119dzy readfile &amp;&amp; @readfile. Spr\u00f3bujmy otworzy\u0107 niew\u0142a\u015bciwy plik przez readfile:<\/p>\n<pre class=\"brush: php; gutter: true\">&lt;? php $ file = readfile (&quot;wrong_test.txt&quot;); if (! $ file) {echo &#39;File not found.&#39;; } else {plik echo $; }?&gt;<\/pre>\n<p><strong>Wydajno\u015b\u0107<\/strong><\/p>\n<table class=\"table table-hover\">\n<tbody>\n<tr>\n<td><strong>(!)<\/strong><strong>?Warning: readfile(wrong_test.txt): failed to open stream: No such file or directory <\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Call Stack<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Nie znaleziono pliku. Teraz zamie\u0144 readfile na @ readfile i otrzymamy wynik jako: File not found.<\/p>\n<h2>Dobra praktyka!<\/h2>\n<p>Je\u015bli jeste\u015bmy programist\u0105, powinni\u015bmy zawsze pami\u0119ta\u0107, \u017ce nasz kod mo\u017ce obs\u0142ugiwa\u0107 b\u0142\u0105d lub warunek. Mo\u017ce si\u0119 zdarzy\u0107, \u017ce plik, kt\u00f3ry chcemy przeczyta\u0107, zosta\u0142 przeniesiony ze \u015bcie\u017cki lub zmieniono uprawnienie do pliku, a zatem nie mo\u017cna pobra\u0107 zawarto\u015bci. Tak wi\u0119c dobra praktyka m\u00f3wi przed przeczytaniem pliku powinni\u015bmy sprawdzi\u0107, czy plik istnieje i czy plik ma uprawnienia do odczytu.<\/p>\n<pre class=\"brush: php; gutter: true\">&lt;? php $ file = &quot;test.txt&quot;; if (file_exists ($ file) &amp;&amp; is_readable ($ file)) {$ f = fopen ($ file, &quot;r&quot;); # Przetwarzanie fclose ($ f); }?&gt;<\/pre>\n<h2>Podsumowanie<\/h2>\n<p>Je\u015bli masz jak\u0105\u015b aplikacj\u0119 e-commerce PHP, tak\u0105 jak PrestaShop, OpenCart, Magneto itp., Mo\u017cesz u\u017cy\u0107 kod\u00f3w do odczytu pliku zgodnie ze swoimi wymaganiami.<script data-cfasync=\"false\" src=\"https:\/\/tdns2.gtranslate.net\/tdn-bin\/queue.js\"><\/script><!-- Yandex.Metrika counter for GTranslate --><script data-cfasync=\"false\">(function (d, w, c) { (w[c] = w[c] || []).push(function() { try { w.yaCounter36618640 = new Ya.Metrika({ id:36618640, clickmap:true, trackLinks:true, accurateTrackBounce:true, ut:\"noindex\" }); } catch(e) { } }); var n = d.getElementsByTagName(\"script\")[0], s = d.createElement(\"script\"), f = function () { n.parentNode.insertBefore(s, n); }; s.type = \"text\/javascript\"; s.async = true; s.src = \"https:\/\/mc.yandex.ru\/metrika\/watch.js\"; if (w.opera == \"[object Opera]\") { d.addEventListener(\"DOMContentLoaded\", f, false); } else { f(); } })(document, window, \"yandex_metrika_callbacks\"); <\/script> <noscript><\/p>\n<div><img decoding=\"async\" src=\"https:\/\/mc.yandex.ru\/watch\/36618640?ut=noindex\" style=\"position:absolute; left:-9999px;\" alt=\"\" \/><\/div>\n<p><\/noscript><br \/>\n<!-- delivered by GTranslate v4.8.8 in 61ms visit https:\/\/gtranslate.io --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cel bloga Po przeczytaniu tego bloga b\u0119dziesz m\u00f3g\u0142 odczyta\u0107 plik w j\u0119zyku PHP. W blogu otrzymasz wystarczaj\u0105c\u0105 ilo\u015b\u0107 informacji na temat innego sposobu wykorzystywania w PHP do odczytu pliku. Dowiedzmy si\u0119 o metodzie czytania plik\u00f3w w PHP PHP udost\u0119pnia r\u00f3\u017cne metody odczytu pliku w nast\u0119puj\u0105cy spos\u00f3b: Tradycyjne metody W tego typu metodzie czytania pliku musimy [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kbui_enabled":"","footnotes":""},"categories":[],"tags":[13403,16598,13402,2425,4541,86,4610,13400,9359,9360,4604,47,13401],"class_list":["post-28122","post","type-post","status-publish","format-standard","hentry","tag-czytaj-plik-w-jzyku-php","tag-czytaj-plik-w-php","tag-e-commerce","tag-magento","tag-odczytaj-plik-php","tag-platforma-cms","tag-platforma-rynkowa","tag-platformy-ecommerce","tag-prestashop","tag-wtyczki-ecommerce"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to read the file in PHP language? - Knowband Blog | Ecommerce Modules<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.knowband.com\/blog\/pl\/ecommerce-blog\/how-to-read-the-file-in-php-language\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to read the file in PHP language? - Knowband Blog | Ecommerce Modules\" \/>\n<meta property=\"og:description\" content=\"Cel bloga Po przeczytaniu tego bloga b\u0119dziesz m\u00f3g\u0142 odczyta\u0107 plik w j\u0119zyku PHP. 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