{"id":3485,"date":"2017-08-15T22:11:23","date_gmt":"2017-08-15T19:11:23","guid":{"rendered":"http:\/\/kamil-abzalov.com\/tutorials\/php-passing-by-reference\/"},"modified":"2020-06-14T23:27:07","modified_gmt":"2020-06-14T20:27:07","slug":"php-passing-by-reference","status":"publish","type":"post","link":"https:\/\/kamil-abzalov.com\/en\/tutorials\/php\/php-passing-by-reference\/","title":{"rendered":"PHP. Passing by reference"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; fullwidth=&#8221;on&#8221; _builder_version=&#8221;3.22&#8243;][et_pb_fullwidth_header title=&#8221;PHP. Passing by reference&#8221; content_max_width=&#8221;none&#8221; _builder_version=&#8221;3.16&#8243; button_one_letter_spacing_hover=&#8221;0&#8243; button_two_letter_spacing_hover=&#8221;0&#8243; button_one_text_size__hover_enabled=&#8221;off&#8221; button_two_text_size__hover_enabled=&#8221;off&#8221; button_one_text_color__hover_enabled=&#8221;off&#8221; button_two_text_color__hover_enabled=&#8221;off&#8221; button_one_border_width__hover_enabled=&#8221;off&#8221; button_two_border_width__hover_enabled=&#8221;off&#8221; button_one_border_color__hover_enabled=&#8221;off&#8221; button_two_border_color__hover_enabled=&#8221;off&#8221; button_one_border_radius__hover_enabled=&#8221;off&#8221; button_two_border_radius__hover_enabled=&#8221;off&#8221; button_one_letter_spacing__hover_enabled=&#8221;on&#8221; button_one_letter_spacing__hover=&#8221;0&#8243; button_two_letter_spacing__hover_enabled=&#8221;on&#8221; button_two_letter_spacing__hover=&#8221;0&#8243; button_one_bg_color__hover_enabled=&#8221;off&#8221; button_two_bg_color__hover_enabled=&#8221;off&#8221;][\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;section&#8221; _builder_version=&#8221;3.22&#8243;][et_pb_row admin_label=&#8221;row&#8221; _builder_version=&#8221;3.25&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; custom_padding=&#8221;0px|||&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;3.25&#8243; custom_padding=&#8221;|||&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_dcsbcm_divi_breadcrumbs_module homebreadcrumbtext=&#8221;Home&#8221; hide_currentbreadcrumb=&#8221;off&#8221; _builder_version=&#8221;4.4.2&#8243; custom_padding=&#8221;0px|||&#8221; hover_enabled=&#8221;0&#8243; fontsbreadcrumbs_font_size_tablet=&#8221;51&#8243; fontsbreadcrumbs_line_height_tablet=&#8221;2&#8243; fontsseperator_font_size_tablet=&#8221;51&#8243; fontsseperator_line_height_tablet=&#8221;2&#8243; fontsbreadcrumblinks_font_size_tablet=&#8221;51&#8243; fontsbreadcrumblinks_line_height_tablet=&#8221;2&#8243;][\/et_pb_dcsbcm_divi_breadcrumbs_module][et_pb_text _builder_version=&#8221;3.27.4&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; use_border_color=&#8221;off&#8221; border_color=&#8221;#ffffff&#8221; border_style=&#8221;solid&#8221;]In this lesson we will discuss value of variables by reference (hard and symbolic links), and data types in php. I will write code in <a href=\"https:\/\/netbeans.org\/\" target=\"_blank\" rel=\"noopener noreferrer\">netbeans ide<\/a> (integrated development environment). <!--more--><br \/>\n[\/et_pb_text][et_pb_video src=&#8221;https:\/\/www.youtube.com\/watch?v=50OsIBhBkEA&#8221; _builder_version=&#8221;3.0.47&#8243;][\/et_pb_video][et_pb_text _builder_version=&#8221;3.27.4&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; use_border_color=&#8221;off&#8221; border_color=&#8221;#ffffff&#8221; border_style=&#8221;solid&#8221;]I recommend you to install this application. It s free and easy to install. Before install it you must download and install java (which netbeans uses) &#8211; <a href=\"http:\/\/www.oracle.com\/technetwork\/java\/javase\/downloads\/jdk8-downloads-2133151.html\" target=\"_blank\" rel=\"noopener noreferrer\">jdk<\/a> (if you write java code) and <a href=\"http:\/\/www.oracle.com\/technetwork\/java\/javase\/downloads\/jre8-downloads-2133155.html\" target=\"_blank\" rel=\"noopener noreferrer\">jre <\/a>(for php, ruby and so on).<br \/>\n[\/et_pb_text][et_pb_dmb_code_snippet title=&#8221;Code lesson&#8221; code=&#8221;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&#8221; admin_label=&#8221;\u041a\u043e\u0434 \u0443\u0440\u043e\u043a\u0430&#8221; style=&#8221;docco&#8221; linenums=&#8221;on&#8221; usetabwidth=&#8221;on&#8221; tabwidth=&#8221;4&#8243; _builder_version=&#8221;4.4.2&#8243; hover_enabled=&#8221;0&#8243;]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[\/et_pb_dmb_code_snippet][et_pb_comments _builder_version=&#8221;4.4.2&#8243; custom_margin=&#8221;30px||||false|false&#8221; hover_enabled=&#8221;0&#8243;][\/et_pb_comments][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this lesson we will discuss value of variables by reference (hard and symbolic links), and data types in php. I will write code in netbeans ide (integrated development environment). I recommend you to install this application. It s free and easy to install. Before install it you must download and install java (which netbeans [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"\u0412 \u0434\u0430\u043d\u043d\u043e\u043c \u0443\u0440\u043e\u043a\u0435 \u043c\u044b \u043e\u0431\u0441\u0443\u0434\u0438\u043c \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0443 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u043f\u043e \u0441\u0441\u044b\u043b\u043a\u0435 (\u0436\u0435\u0441\u0442\u043a\u0438\u0435 \u0438 \u0441\u0438\u043c\u0432\u043e\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0441\u0441\u044b\u043b\u043a\u0438), \u0430 \u0442\u0430\u043a\u0436\u0435 \u0442\u0438\u043f\u044b \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 php. \u041a\u043e\u0434 \u0443\u0440\u043e\u043a\u0430 \u044f \u0431\u0443\u0434\u0443 \u043f\u0438\u0441\u0430\u0442\u044c \u0432 <a href=\"https:\/\/netbeans.org\/\" target=\"_blank\">netbeans ide<\/a> (integrated development environment). <!--more-->\r\n\r\nhttps:\/\/www.youtube.com\/watch?v=50OsIBhBkEA\r\n\r\n\u0420\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u044e \u0432\u0430\u043c \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u0434\u0430\u043d\u043d\u044b\u0439 \u043f\u0440\u043e\u0434\u0443\u043a\u0442 - \u043e\u043d \u0430\u0431\u0441\u043e\u043b\u044e\u0442\u043d\u043e \u0431\u0435\u0441\u043f\u043b\u0430\u0442\u043d\u044b\u0439 \u0438 \u043b\u0435\u0433\u043a\u043e \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0435\u0442\u0441\u044f. \u041f\u0440\u0435\u0436\u0434\u0435 \u0447\u0435\u043c \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c netbeans, \u0432\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0441\u043a\u0430\u0447\u0430\u0442\u044c \u0438 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c java (\u043d\u0430 \u043a\u043e\u0442\u043e\u0440\u043e\u0439 netbeans \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442) - <a href=\"http:\/\/www.oracle.com\/technetwork\/java\/javase\/downloads\/jdk8-downloads-2133151.html\" target=\"_blank\">jdk<\/a> (\u0435\u0441\u043b\u0438 \u0432\u044b \u0431\u0443\u0434\u0435\u0442 \u043f\u0438\u0441\u0430\u0442\u044c java \u043a\u043e\u0434) \u0438 <a href=\"http:\/\/www.oracle.com\/technetwork\/java\/javase\/downloads\/jre8-downloads-2133155.html\" target=\"_blank\">jre <\/a>(\u0434\u043b\u044f php, ruby \u0438 \u0434\u0440.)\r\n<strong>\u041a\u043e\u0434 \u0443\u0440\u043e\u043a\u0430:<\/strong>\r\n\r\n<pre><code><?php\r\n\r\n\/**\r\n * PHP - \u044f\u0437\u044b\u043a \u0441 \u0434\u0438\u043d\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0442\u0438\u043f\u0438\u0437\u0430\u0446\u0438\u0435\u0439\r\n * \u0422\u0438\u043f\u044b \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445\r\n * \u0421\u043a\u0430\u043b\u044f\u0440\u043d\u044b\u0435\r\n *     boolean (true\/false (TRUE\/FALSE));\r\n *     integer (10,100,-1600);\r\n *     float (10.4, -5.6);\r\n *     string (\"test\");\r\n * \u0421\u043c\u0435\u0448\u0430\u043d\u043d\u044b\u0435\r\n *      array - ($arr = (1,2,3,4));\r\n *      object - \u043e\u0431\u044a\u0435\u043a\u0442\r\n * \u0421\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0435\r\n *      resource\r\n *      null   \r\n *\/\r\n\r\n$x = 20;\r\n$y = &$c;\r\n\/*$x = $x + 2;\r\n$y = $x;\r\necho \"<br>\";*\/\r\necho \"x ravno $x\";\r\necho \"<br>\";\r\necho \"y ravno $y\";\r\necho \"<br>\";\r\n\r\nunset($x);\r\nunset($y);\r\necho \"x ravno $x\";\r\necho \"<br>\";\r\necho \"y ravno $y\";\r\necho \"<br>\";\r\n\r\n$var = \"100\";\r\necho gettype($var);\r\n$p = \"var\";\r\n\r\necho $$p;\r\necho \"<br>\";\r\n\r\necho \"y ravno $y\";\r\necho \"<br>\";\r\necho \"c ravno $c\";\r\necho \"<br>\";\r\n\r\necho gettype($y);\r\necho gettype($c);\r\necho \"<br>\";\r\n\r\necho \"$d\";\r\n<\/code><\/pre>","_et_gb_content_width":"","footnotes":""},"categories":[273,219],"tags":[240],"class_list":["post-3485","post","type-post","status-publish","format-standard","hentry","category-php","category-tutorials","tag-php-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PHP. Passing by reference - Kamil Abzalov&#039;s blog<\/title>\n<meta name=\"description\" content=\"In this lesson you will know hot to pass value by reference and which data types are in php\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kamil-abzalov.com\/videouroki\/php\/php-references\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP. Passing by reference - Kamil Abzalov&#039;s blog\" \/>\n<meta property=\"og:description\" content=\"In this lesson you will know hot to pass value by reference and which data types are in php\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kamil-abzalov.com\/videouroki\/php\/php-references\/\" \/>\n<meta property=\"og:site_name\" content=\"\u0441\u0430\u0439\u0442 \u041a\u0430\u043c\u0438\u043b\u044f \u0410\u0431\u0437\u0430\u043b\u043e\u0432\u0430\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/kamabzalov\" \/>\n<meta property=\"article:published_time\" content=\"2017-08-15T19:11:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-06-14T20:27:07+00:00\" \/>\n<meta name=\"author\" content=\"Kamil&#039; Abzalov\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"PHP. Passing by reference\" \/>\n<meta name=\"twitter:description\" content=\"In this lesson you will know hot to pass value by reference and which data types are in php\" \/>\n<meta name=\"twitter:creator\" content=\"@kamabzalov\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kamil&#039; Abzalov\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/kamil-abzalov.com\\\/videouroki\\\/php\\\/php-references\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/kamil-abzalov.com\\\/videouroki\\\/php\\\/php-references\\\/\"},\"author\":{\"name\":\"Kamil' Abzalov\",\"@id\":\"https:\\\/\\\/kamil-abzalov.com\\\/#\\\/schema\\\/person\\\/9c53360f21b83306ba40c2231573c600\"},\"headline\":\"PHP. 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