PHP collection

Execute a database query: Delete database; <br/>?php // Assume database username: root, password: 123456, database name: RUNOOB; $con = mysqli_connect('localhost', 'root', '123456', 'RUNOOB...');

MySQLi database connection: `<?php define('DB_NAME', 'api_4s5_cn'); define('DB_USER', 'api_4s5_cn'); define('DB_PASSWORD', '4Eh6DEsLCT5HebjR'); define('DB_HOST', 'lo...');`

&lt;?php $userinfo = &quot;Name: &lt;b&gt;PHP&lt;/b&gt; &lt;br&gt; Title: &lt;b&gt;Programming Language&lt;/b&gt;&quot;; preg_match_all (&quot;/&lt;b&…

Escape character is a special character constant. Escape characters are backslashed " & quot; At the beginning, followed by one or more characters. The escaped character has a specific meaning, which is different from the original meaning of the character, so it is called "escaped" character. The use of escape characters 1: turn ordinary characters into special purposes, such as back key and enter key. 2. Used to convert a character with special meaning back to its original meaning. 3. Before data is written into the database, escape characters (function …

Recently, I wanted to collect the names of some resource websites, so I found a fun one when I collected it. The opposite website was loaded by ajax technology, so I found the api, so I just wrote the code directly to put it in the warehouse. The code is backed up here and will be used in the future. & lt; ? php $date = file_get_contents(' Website address ' ); $date = json_deco…

& lt; ? php $str=& quot; as2223adfsf0s4df0sdfsdf& quot; ; echo preg_replace(& quot; /0/& quot; ,& quot; & quot; ,$str); //Remove the 0 character, which is equivalent to the function of replace, preg _ replace (&; quot; /…

Get the data type 1. If you want to check the value and type of an expression, use var_dump(). 2. If you just want to get an easy-to-read type expression for debugging, use gettype(). 3. To check a certain type, do not use gettype(), but use the is_type() function. Converting Strings to Numbers When a string is evaluated as a number, the result is determined according to the following rules...