Search functionality is very useful for the data list. It helps to find the relevant records quickly from the database. Search term highlighting feature makes the search functionality user-friendly. Highlight keyword<\/b> helps the user to easily identify the more relevant records in search results.<\/p>\n
In the keywords highlighting feature, the search terms are highlighted with the different background color or text color in the search results. In this tutorial, we will show you how to search in MySQL database and highlight keyword in search<\/b> results with PHP.<\/p>\nHighlight Words in Text<\/h2>\n
The highlightWords()<\/b> is a custom function that helps to highlight the words in the text.<\/p>\n In the example code, we will fetch the posts data from the database and listed on the web page. Based on the search, the records will be filtered and the search term will be highlighted in the search results.<\/p>\n For this example, we will create a posts table with some basic fields in the MySQL database. The The following code is used to connect the database using PHP and MySQL. Specify the database host ( Initially, all the records are fetched from the database and listed on the web page. Based on the search keyword, the words are highlighted in the search list.<\/p>\n\n
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$text<\/code> – The content to search and replace.<\/li>\n$word<\/code> – The string to search for.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\/\/ Highlight words in text\n<\/span>function <\/span>highlightWords<\/span>(<\/span>$text<\/span>, <\/span>$word<\/span>){\n <\/span>$text <\/span>= <\/span>preg_replace<\/span>(<\/span>'#'<\/span>. <\/span>preg_quote<\/span>(<\/span>$word<\/span>) .<\/span>'#i'<\/span>, <\/span>'<span class=\"hlw\">\\\\0<\/span>'<\/span>, <\/span>$text<\/span>);\n return <\/span>$text<\/span>;\n}<\/span><\/pre>\nCreate Database Table<\/h2>\n
posts<\/code> table holds the records which will be searched and highlighted.<\/p>\nCREATE<\/span> TABLE<\/span> `posts`<\/span> (\n `id`<\/span> int<\/span>(11<\/span>) NOT<\/span> NULL<\/span> AUTO_INCREMENT,\n `title`<\/span> varchar<\/span>(255<\/span>) COLLATE<\/span> utf8_unicode_ci NOT<\/span> NULL<\/span>,\n `content`<\/span> text<\/span> COLLATE<\/span> utf8_unicode_ci NOT<\/span> NULL<\/span>,\n `created`<\/span> datetime NOT<\/span> NULL<\/span>,\n `modified`<\/span> datetime NOT<\/span> NULL<\/span>,\n PRIMARY KEY<\/span> (`id`<\/span>)\n) ENGINE<\/span>=InnoDB<\/span> DEFAULT<\/span> CHARSET<\/span>=utf8 COLLATE<\/span>=utf8_unicode_ci;<\/pre>\nDatabase Configuration (dbConfig.php)<\/h2>\n
$dbHost<\/code>), username ($dbUsername<\/code>), password ($dbPassword<\/code>), and name ($dbName<\/code>) as per your database credentials.<\/p>\n<?php\n<\/span>\/\/ Database configuration\n<\/span>$dbHost <\/span>= <\/span>\"localhost\"<\/span>;\n<\/span>$dbUsername <\/span>= <\/span>\"root\"<\/span>;\n<\/span>$dbPassword <\/span>= <\/span>\"root\"<\/span>;\n<\/span>$dbName <\/span>= <\/span>\"codexworld\"<\/span>;\n\n<\/span>\/\/ Create database connection\n<\/span>$db <\/span>= new <\/span>mysqli<\/span>(<\/span>$dbHost<\/span>, <\/span>$dbUsername<\/span>, <\/span>$dbPassword<\/span>, <\/span>$dbName<\/span>);\n\n<\/span>\/\/ Check connection\n<\/span>if (<\/span>$db<\/span>-><\/span>connect_error<\/span>) {\n die(<\/span>\"Connection failed: \" <\/span>. <\/span>$db<\/span>-><\/span>connect_error<\/span>);\n}<\/span><\/pre>\nHighlight Keywords in Search Results<\/h2>\n
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highlightWords()<\/code> function is used to add the highlighting class in the matched words.<\/li>\n<\/ul>\n<\/li>\n<?php\n<\/span>\/\/ Include the database config file\n<\/span>require_once <\/span>'dbConfig.php'<\/span>;\n\n<\/span>\/\/ If the search form is submitted\n<\/span>$searchKeyword <\/span>= <\/span>$whrSQL <\/span>= <\/span>''<\/span>;\nif(isset(<\/span>$_POST<\/span>[<\/span>'searchSubmit'<\/span>])){\n <\/span>$searchKeyword <\/span>= <\/span>$_POST<\/span>[<\/span>'keyword'<\/span>];\n if(!empty(<\/span>$searchKeyword<\/span>)){\n <\/span>\/\/ SQL query to filter records based on the search term\n <\/span>$whrSQL <\/span>= <\/span>\"WHERE (title LIKE '%\"<\/span>.<\/span>$searchKeyword<\/span>.<\/span>\"%' OR content LIKE '%\"<\/span>.<\/span>$searchKeyword<\/span>.<\/span>\"%')\"<\/span>;\n }\n}\n\n<\/span>\/\/ Get matched records from the database\n<\/span>$result <\/span>= <\/span>$db<\/span>-><\/span>query<\/span>(<\/span>\"SELECT * FROM posts <\/span>$whrSQL<\/span> ORDER BY id DESC\"<\/span>);\n\n<\/span>\/\/ Highlight words in text\n<\/span>function <\/span>highlightWords<\/span>(<\/span>$text<\/span>, <\/span>$word<\/span>){\n <\/span>$text <\/span>= <\/span>preg_replace<\/span>(<\/span>'#'<\/span>. <\/span>preg_quote<\/span>(<\/span>$word<\/span>) .<\/span>'#i'<\/span>, <\/span>'<span class=\"hlw\">\\\\0<\/span>'<\/span>, <\/span>$text<\/span>);\n return <\/span>$text<\/span>;\n}\n<\/span>?><\/span><\/pre>\n<!-- Search form --><\/span>\n<form<\/span> method<\/span>=\"post\"<\/span>><\/span>\n <div<\/span> class<\/span>=\"input-group\"<\/span>><\/span>\n <input<\/span> type<\/span>=\"text\"<\/span> name<\/span>=\"keyword\"<\/span> value<\/span>=\"<?php <\/span>echo <\/span>$searchKeyword<\/span>; <\/span>?><\/span>\"<\/span> placeholder<\/span>=\"Search by keyword...\"<\/span> ><\/span>\n <input<\/span> type<\/span>=\"submit\"<\/span> name<\/span>=\"searchSubmit\"<\/span> value<\/span>=\"Search\"<\/span>><\/span>\n <\/div<\/span>><\/span>\n<\/form<\/span>><\/span><\/pre>\n<!-- Search results --><\/span>\n<?php\n<\/span>if(<\/span>$result<\/span>-><\/span>num_rows <\/span>> <\/span>0<\/span>