PHP Mysql Tutorial
Objavljeno: 14 oktober 2010Tags: MySQL , PHP , PHP MYSQL , PHP MYSQL tutorial , programiranje , programiranje Tutorial
Tags: MySQL , PHP , PHP MYSQL , PHP MYSQL tutorial , programiranje , programiranje Tutorial
Arhiv za kategorijo 'mysql'
Tags: MySQL , PHP , PHP MYSQL , PHP MYSQL tutorial , programiranje , programiranje Tutorial
Arhiv za kategorijo 'mysql'
PHP Mysql Tutorial
Objavljeno: 14 oktober 2010Tags: MySQL , PHP , PHP MYSQL , PHP MYSQL tutorial , programiranje , programiranje Tutorial
Eden in edini baze upravljanja programa stranke gostiteljice internet ne bo nikoli izvedeli, je My SQL. Razlog, zakaj tako številni po vsem svetu, spletni gostitelji ponujajo MySQL bo verjetno razložena spodaj. Pogost z drugimi DMS MySQL uporablja SQL jezik in je kupil Sun Microsystems letos za skoraj eno samo milijarde dolarjev.
Open Source programska oprema
Oseba najmočnejših prednosti MySQL je, da je upravljanje baz podatkov Tehnika temelji na odprti programov oskrbe. To ne pomeni pa, da bi bilo treba upoštevati avtocesta. Ne, še vedno število patentiranih funkcij za ta program in stane denarja za uporabo. Vendar tako, da ga gradnjo kot odprto računalniške opreme oskrbe MySQL omogoča svojim uporabnikom gotovost svobode spremeniti DBMS, kot jim ustreza. Pod licenco General Public License MySQL ima odprto kodo in ponudbe, kot je program, razdeljen strankam dovoljenje jim dajejo pravico, da si ogledate, spremeniti in izboljšati virov kodo, s čimer se programski paket. To je oseba, ki od razlogov, zakaj MySQL je izkažejo za tako močno znan.
Hitre Posodobitve in osebni prijazno
Ko so drugi sistemi za upravljanje baz podatkov, kot so Oracle počasi na posodobitev MySQL redko kaj je njihove stranke čakati. Nove in nadgrajene različice, ki prihajajo iz več kot pogosto in v začetni položaj, kot primarno bazo podatkov strežnika izgleda, da je MySQL odkrili svoje mesto. Poznati in uporabljati predvsem z Linux programa operativnega, ki pravkar se zgodi, da je najprimernejša metoda za operativni neto strežnikov, MySQL je tudi hitro in zanesljivo.
cPanel, phpMyAdmin in MySQL
Odličen primer platformo neke začetnik na porabo podatkovnih baz je nadzorna plošča mnogi domačini interneta so z uporabo, cPanel. Ne samo, da bo oseba, ki ima dostop do video Vadnice za ustvarjanje baze pa phpMyAdmin funkcija omogoča uporabniku vizualno pomoč pri upravljanju številnih nalog MySQL. Poleg tega prisotnost MySQL omogoča številne besedo široke spletni gostitelji zagotoviti PHP skripte, ki bodo omogočili oseba za razvoj dinamičnih aplikacij za svojo spletno stran
Arhiv za kategorijo 'mysql'
PHP Mysql Tutorial
Objavljeno: 14 oktober 2010Tags: MySQL , PHP , PHP MYSQL , PHP MYSQL tutorial , programiranje , programiranje Tutorial
1). CCCA z IDX modelov spletnih
Sistem za upravljanje vsebin temelji na PHP in MySQL. Močna še enostaven CMS za vse. Celovito funkcionalnost. Cen se zdi razumno za majhno podjetje. Enostavna namestitev in uporabniku prijazen. Na voljo samo za vse spletne modelov IDX stranke. Kontakt IDX spletne modeli in zahtevajte ponudbo
2). Joomla , ki jih Wilco Jansen
Nagrajena sistem za upravljanje vsebin (CMS), ki omogoča izgradnjo spletnih strani in spletnih aplikacij močna. Številni vidiki, vključno z njegovo udobje pri uporabi in razširjanje programov so se Joomla najbolj priljubljen spletni strani programske opreme na voljo. Best of all, Joomla je odprtokodni rešitev, ki je brezplačno na voljo vsem.
3). WordPress z Ryan Boren
State-of-the-art založništvo platforma s poudarkom na estetiki, spletne standarde in uporabnost. WordPress je tako prost in neprecenljivo ob istem času.
Bolj preprosto, WordPress je tisto, kar boste uporabili, če želite delati z vašo blogging software, ga ne boj.
4). Soholaunch
Enostaven za uporabo orodja za ustvarjanje spletnih strani, ki vam pomaga graditi, vzdrževati in upravljati vaše osebne ali poslovne spletne strani. Deluje že od vaše spletne strani, tako da enostavno sprejeti naročil nakupovalni voziček spletu, ustvarite obrazce in urejanje mestu strani s katerega koli računalnika na svetu!
5). Drupal
Prost paket, ki omogoča posameznik ali skupnost uporabnikov preprosto objavijo, upravljanje in organiziranje različnih vsebin na spletni strani. Več deset tisoč ljudi in organizacij, so z uporabo Drupal za pogon sto različnih spletnih strani
Arhiv za kategorijo 'mysql'
PHP Mysql Tutorial
Objavljeno: 14 oktober 2010Tags: MySQL , PHP , PHP MYSQL , PHP MYSQL tutorial , programiranje , programiranje Tutorial
Prva stvar, ki jo morate storiti, je povezati z bazo podatkov.
mysql_connect("somehost", "username", "password") or die ("Can't connect!");
This will try to connect to the database on somehost and login with “username” as the username and “password” as the password. If it can’t, it will output an error message saying that it can’t connect. For your own code be sure to change somehost to your host (most of the times it’s localhost, ask your admin), username to your username (duh), and password to your password. Another way to connect to a database is to open a persistent connection. To do this, use the mysql_pconnectfunction and pass it the same arguments as mysql_connect. Why open a persistent connection? When you call mysql_pconnect, instead of going out and opening a connection to the database, it sees if one is already open, if it is, the script will use it. Also, when the script has finished executing, the connection to the database will not automatically be closed like it is when using mysql_connect. This way the connection can be used later on. Using a persistent connection is a good idea if your scripts constantly need to connect to the database.
After we have opened a connection to the database, we then select a database.
mysql_select_db("database_name") or die("Can't select database!");
This will try to select the database named “database_name” (for your own code change it to the name of your database). If it can’t select the database, it will output and error. Once you’re actually connected to a database, you will want to query a table in the database to get whatever you want done. A query looks like this:
mysql_query("Some query");
Common queries are SELECTand INSERT For full documentation go to the mysql web site ( http://www.mysql.com ). Another common php function is mysql_num_rows; if it isn’t obvious this gets the number of rows from a query. Here is an example of how it can be used with mysql_query:
<?php
$result= mysql_query("SELECT * FROM some_table");
$number_of_rows= @mysql_num_rows($result);
if ($number_of_rows == 0)
{
echo "Sorry there are no rows";
}
else {
echo "Yes! we found some rows!";
}
?>
Now you may be wondering why I put the @ sign before mysql_num_rows. In php, the @ sign suppress errors; I put it in front of mysql_num_rows so that if there are no rows, MySQL will not output a bunch of errors. So when would mysql_num_rows be useful? Well, you could use it for an authentication script which searchs the database for a username and password and if it doesn’t find any (i.e. if no rows are returned), it tells the user that the username, or password, are not correct.
Another really useful function is mysql_fetch_array, because it gets the rows and puts them in an array that contains the name of the rows. That way instead of having to access each row by number you can do it by name! For example, let’s say that our database looked like this:
| User | Password |
| John | afasdfadsfdsf |
| Billy | tla;jrjealjwqsldajf |
| Mitch | pqrtupipripewir |
We would use the following code to get the users’ names and output them:
<?php
echo "The users in this database are: <br>";
$result= mysql_query("SELECT * FROM some_table");
while ($row= mysql_fetch_array($result))
{
$username= $row["User"];
echo "$username<br>";
}
?>
This will output all the usernames in a database; you can add error checking if you like. The while statement is read “while there are rows that satisfy the query, put the contents of the row from the column ‘User’ into the variable ‘username,’ and print the usernames (each on a new line) to an HTML page.”
Now let’s cover a couple of functions that actually work with the database. The first is mysql_create_db, don’t you just love how the functions are named you can figure out what they do just by looking at the function name, this one obviously creates a database. Here’s how to use it:
<?php
echo "I am going to try to create a database...<br>";
if (mysql_create_db("test_database"))
{
echo "Hooray, I've created the database!<br>";
}
else {
echo "Darn couldn't create the database! because: ";
echo "mysql_error() <br>";
}
?>
You can see I used a new function, mysql_error, you don’t really need to know too much about it, all it does is return the error string sent by MySQL. Now since we learned how to create a database, how’s about we learn to delete one. To do that use the mysql_drop_db, here is how to use it:
<?php
echo "I am going to try to delete a database...<br>";
$result= mysql_drop_db("test_database");
if (!$result)
{
echo "Darn couldn't I couldn't delete the database!<br>";
}
else {
echo "Hooray, I've deleted the database<br>";
}
?>
You can see that the syntax is very similar to that of mysql_create_db, just pop the name of the database you want to delete into the function.
The next two items aren’t functions, rather they are queries that you can use to manage an existing table. The following query will insert data into a database:
<?php
echo "I am going to try to insert data into a table...<br>";
$result= mysql_query("INSERT INTO test_database (username, password) VALUES
(Rahim, adfjaldadfsdaf)");
if (!$result)
{
echo "Darn couldn't I couldn't delete the database!<br>";
}
else {
echo "Hooray, I've deleted the database<br>";
}
?>
This query should be pretty obvious, it inserts the data defined in between the parentheses into the rows. Just a little note to remember, the order in which you write out the column names is the order your data will be entered (i.e. a row with the contents Rahim will be entered under username, not password since we wrote username then pasword, if it was reveresd Rahim would be put under password).
The next query we’ve already gone over, I’m just going to add to it; after I’m done you should be able to use it to help create a simple search engine (upcomming tutorial)! For the sake of brevity I’ll remove all the extra php stuff and just show you the “meat” of the code.
$result= mysql_query("SELECT name FROM some_table WHERE name=Joe AND
lastname=Sixpack OR lastname=Becker ORDER BY lastname LIMIT 20");
Now I know that looks like a long query, but it’s not really all that bad. What it’s pretty much saying is: “Get me the name from some_table where the name is Joe and the lastname is Sixpack or Becker, oh and by the way while your at it, put it in alphabetical order by the lastname; oh and one last thing, just get the first 20 results please.” MySQL has lots of other filters that you can add on to the SELECT statement, I highly suggest you download the MySQL documentation and give it a perusing.
