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PHP MySQL Database

Source: Internet
Author: User
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1. Connect to the database

Mysql-u root-p

2. Show several databases

Show Databses

3. Create a Database

<?php$con = mysql_connect ("localhost", "root", "a76d290e04"), if (! $con) {die (' Could not connect: '. Mysql_error () );} if (! $con) {die (' Could not connect: '. Mysql_error ());} if (mysql_query ("CREATE DATABASE my_db", $con)) {echo "DATABASE created";} else {echo "Error creating DATABASE:". Mysql_error ();} mysql_select_db ("my_db", $con); $sql = "CREATE TABLE Persons (FirstName varchar (), LastName varchar (), age int)"; MySQL _query ($sql, $con); Mysql_close ($con);  ? >

Two. Inserting data 

<body><?php$con = mysql_connect ("localhost", "root", "a76d290e04"), if (! $con) {die (' Could not connect: '). Mysql_error ());} if (! $con) {die (' Could not connect: '. Mysql_error ());} mysql_select_db ("my_db", $con); $sql = "INSERT into Persons (FirstName, LastName, age) VALUES (' $_post[firstname] ', ' $_po St[lastname] ', ' $_post[age] '), if (! mysql_query ($sql, $con)) {die (' Error: '. mysql_error ());} echo "1 record added"; Mysql_close ($con);? ><form action= "index.php" method= "POST" >firstname: <input type= "text" name= "Firstname"/> Lastname: <input type= "text" name= "LastName"/>age: <input type= "text" name= "age"/> <input type= "Submit"/>< /form></body>


Three. Querying data 

<?php$con = mysql_connect ("localhost", "root", "a76d290e04"), if (! $con) {die (' Could not connect: '. Mysql_error () );} if (! $con) {die (' Could not connect: '. Mysql_error ());} mysql_select_db ("my_db", $con); $result = mysql_query ("SELECT * from Persons") and while ($row = Mysql_fetch_array ($resul T) {echo $row [' FirstName ']. " " . $row [' LastName '];echo "<br/>";} Mysql_close ($con);? >



PHP MySQL Database

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