Homeless. Homeless See what “homeless” is in other dictionaries
Hello! Now we will try to implement the simplest registration on the site using PHP + MySQL. To do this, Apache must be installed on your computer. The working principle of our script is shown below.
1. Let's start by creating the users table in the database. It will contain user data (login and password). Let's go to phpmyadmin (if you are creating a database on your PC http://localhost/phpmyadmin/). Create a table users, it will have 3 fields.
I create it in the mysql database, you can create it in another database. Next, set the values as in the figure:
2. A connection to this table is required. Let's create a file bd.php. Its content:
$db = mysql_connect("your MySQL server","login for this server","password for this server");
mysql_select_db ("name of the database we are connecting to", $db);
?>
In my case it looks like this:
$db = mysql_connect("localhost","user","1234");
mysql_select_db("mysql",$db);
?>
Save bd.php.
Great! We have a table in the database and a connection to it. Now you can start creating a page on which users will leave their data.
3. Create a reg.php file with the contents (all comments inside):
Registration
4. Create a file, which will enter data into the database and save the user. save_user.php(comments inside):
{
}
//if the login and password are entered, then we process them so that tags and scripts do not work, you never know what people might enter
//remove extra spaces
$login = trim($login);
$password = trim($password);
// connect to the database
// check for the existence of a user with the same login
$result = mysql_query("SELECT id FROM users WHERE login="$login"",$db);
if (!empty($myrow["id"])) (
exit("Sorry, the login you entered is already registered. Please enter another login.");
}
// if this is not the case, then save the data
$result2 = mysql_query("INSERT INTO users (login,password) VALUES("$login","$password")");
// Check if there are errors
if ($result2=="TRUE")
{
echo "You have successfully registered! Now you can enter the site. Home page";
}
else(
echo "Error! You are not registered.";
}
?>
5. Now our users can register! Next, you need to create a “door” for already registered users to enter the site. index.php(comments inside) :
// the whole procedure works in sessions. It is where the user's data is stored while he is on the site. It is very important to launch them at the very beginning of the page!!!
session_start();
?>
Home page
// Check if the login and user id variables are empty
if (empty($_SESSION["login"]) or empty($_SESSION["id"]))
{
// If empty, then we do not display the link
echo "You are logged in as a guest
This link is only available to registered users";
}
else
{
In file index.php We will display a link that will be open only to registered users. This is the whole point of the script - to limit access to any data.
6. There remains a file with verification of the entered login and password. testreg.php (comments inside):
session_start();// the whole procedure works on sessions. It is where the user's data is stored while he is on the site. It is very important to launch them at the very beginning of the page!!!
if (isset($_POST["login"])) ( $login = $_POST["login"]; if ($login == "") ( unset($login);) ) //enter the login entered by the user into $login variable, if it is empty, then destroy the variable
if (isset($_POST["password"])) ( $password=$_POST["password"]; if ($password =="") ( unset($password);) )
//put the user-entered password into the $password variable, if it is empty, then destroy the variable
if (empty($login) or empty($password)) //if the user did not enter a login or password, then we issue an error and stop the script
{
exit("You have not entered all the information, go back and fill out all the fields!");
}
//if the login and password are entered, then we process them so that tags and scripts do not work, you never know what people might enter
$login = stripslashes($login);
$login = htmlspecialchars($login);
$password = stripslashes($password);
$password = htmlspecialchars($password);
//remove extra spaces
$login = trim($login);
$password = trim($password);
// connect to the database
include("bd.php");// the bd.php file must be in the same folder as all the others, if it is not then just change the path
$result = mysql_query("SELECT * FROM users WHERE login="$login"",$db); //retrieve from the database all data about the user with the entered login
$myrow = mysql_fetch_array($result);
if (empty($myrow["password"]))
{
//if the user with the entered login does not exist
}
else(
//if exists, then check the passwords
if ($myrow["password"]==$password) (
//if the passwords match, then we launch a session for the user! You can congratulate him, he got in!
$_SESSION["login"]=$myrow["login"];
$_SESSION["id"]=$myrow["id"];//this data is used very often, so the logged in user will “carry it with him”
echo "You have successfully entered the site! Home page";
}
else(
//if the passwords do not match
Exit ("Sorry, the login or password you entered is incorrect.");
}
}
?>
OK it's all over Now! The lesson may be boring, but very useful. Only the idea of registration is shown here, then you can improve it: add protection, design, data fields, loading avatars, logging out of the account (to do this, simply destroy the variables from the session with the function unset) and so on. Good luck!
I checked everything, it works properly!
DEADLY
DEADLY
HORRIBLE, poor person, unlucky person, a person who did not have a share, a part, or happiness. There is no place for the homeless anywhere.
| bot. speaking of seed lobes, about seedling leaves: plants that do not have these lobes, acotyledones; These are precisely the lower two classes, flowerless plants: horsetails, ferns, mosses, mosses, moss, mushrooms, algae. Idle man homeless woman poor, unfortunate, unfortunate. To deprive someone of allotment, to deprive someone of an allotment, share, part, share, to not participate;
| deprive of happiness, inheritance, fate, ruin, offend, oppress. Why are you depriving me, evil fate? My neighbors are poor and don’t give me any land. To be idle, to live without a share, to be poor, to be miserable. Lack of Dole Wed. homeless woman adversity, misfortune, grief, misfortune, prolonged disaster, timelessness, evil, bad fate; homelessness of women lack of life, adversity of fate, fate;
| homeless people Stepsons are homeless.
Dahl's Explanatory Dictionary. IN AND. Dahl. 1863-1866.
Synonyms:
See what “WORTHLESS” is in other dictionaries:
Cm … Synonym dictionary
Bezdolny, Alexander Vasilyevich Alexander Vasilyevich Bezdolny Party: United Russia Birth: September 5, 1935 (1935 ... Wikipedia
Adj. decomposition 1. ratio with noun lack of happiness associated with it 2. Deprived of a happy lot; unhappy, miserable. Ephraim's explanatory dictionary. T. F. Efremova. 2000... Modern explanatory dictionary of the Russian language by Efremova
Worthless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless, debtless,... ... Forms of words
homeless- homeless; briefly linen shape, linen... Russian spelling dictionary
Aya, oh; flax, flax, flax. Trad. adv. Not knowing a happy fate; unhappy, miserable (usually about a person or his life) ... encyclopedic Dictionary
homeless- oh, oh; flax, flax, flax., trad. adv. Not knowing a happy fate; unhappy, miserable (usually about a person or his life) ... Dictionary of many expressions
homeless- without/dol/n/y… Morphemic-spelling dictionary
Deputy of the State Duma of the Federal Assembly of the Russian Federation of the third convocation since December 1999, member of the Unity faction, member of the Budget Committee; born September 5, 1935 in Pavlodar region; graduated from Tomsk Financial Credit College... Large biographical encyclopedia
Sergey Leonidovich Bezdolny mayor of the city of Azov, Rostov region. Biography Born on October 20, 1959 in the city of Azov. Higher education. In 1982 he graduated from the Rostov-on-Don Institute of Agricultural Engineering in... ... Wikipedia
#include
#include
int regcomp(regex_t *preg, const char *regex, intcflags);
int regexec(const regex_t *preg, const char *string, size_tnmatch,
regmatch_tpmatch, inteflags);
size_t regerror(interrcode, const regex_t *preg, char *errbuf,
size_terrbuf_size);
void regfree(regex_t *preg);
DESCRIPTION
Compiling POSIX regular expressions
Function regcomp() is used to compile the regular expression into a format that is suitable for subsequent searches using regexec().regcomp() a pointer to the buffer template storage area is passed preg, pointer to a null-terminated string regex and flags cflags, used to determine the compilation type.
All regular expression searches must be done using a compiled buffer pattern, so regexec() must always be called with the address of the buffer template initialized by the function regcomp().
Meaning cflags may consist of bitwise or zero or more of the following values:
REG_EXTENDED Use POSIX extended regular expression syntax during interpretation regex. If this flag is not enabled, POSIX simple regular expression syntax is used. REG_ICASE Ignore case. Subsequent searches regexec() using this buffer pattern will not be case sensitive. REG_NOSUB Do not report the position of matches. Options nmatch And pmatch For regexec() are ignored if the given buffer template was compiled with this flag enabled. REG_NEWLINE Match operators with any character do not match the newline character.List of non-matching characters ( [^...] ) without a newline character is not the same as a newline.
Comparison operator based on the beginning of a string ( ^ ) matches the empty string immediately after the newline no matter what eflags, execution flags regexec(), contain REG_NOTBOL.
The end-of-line comparison operator ($) matches the empty string up to the start-of-line character, no matter what eflags contains REG_NOTEOL.
Comparison with POSIX regular expression
Function regexec() is used to compare a null-terminated string to a pre-processed buffer pattern preg. Arguments nmatch And pmatch are used to provide information about the location of any matches. Meaning eflags may be bitwise OR one or both values REG_NOTBOL And REG_NOTEOL. These values determine the behavior of the comparison process as described below. REG_NOTBOL The comparison operator at the beginning of the string always fails (but see the compilation flag described above REG_NEWLINE). This flag can be used when regexec() separate parts of a string are transmitted, and the beginning of such a string in this case should not be interpreted as the beginning of a new line. REG_NOTEOL The end-of-line comparison operator always fails (but see the compilation flag described above REG_NEWLINE).Byte offsets
If REG_NOSUB is not set when compiling the buffer template, it is possible to obtain information about the position of matches. Meaning pmatch must be defined to have at least nmatch elements. They're filling up regexec() addresses of inline matches. Offsets of a subexpression starting with i- open parenthesis, stored in pmatch[i]. The match address of the entire regular expression is stored in pmatch(note that to return the match offsets N subexpressions, meaning nmatch must be no less N+1). Any unused structure elements will contain a value of -1.Structure regmatch_t, which is a type pmatch, defined in
Typedef struct ( regoff_t rm_so; regoff_t rm_eo; ) regmatch_t;
Each element rm_so, not equal to -1, indicates the starting offset of the next match of the largest substring within the given string. Relative element rm_eo indicates the offset of the end of the match, which is the first character after the matched text.
POSIX Error Reporting
Function regerror used to convert error codes that may be received from regcomp() And regexec(), into error message lines.IN regerror transmitted: error code errcode, buffer pattern preg, a pointer to a character string buffer errbuf and row buffer size errbuf_size. The function returns the size errbuf, which is required to store the error message as a null-terminated string. If errbuf, And errbuf_size are not equal to zero, then errbuf filled first errbuf_size - 1 error message characters and ends with a null byte ("\0").
Freeing a POSIX template buffer
Function regfree() frees the memory allocated to the buffer template preg during the compilation process using regcomp().RETURN VALUE
Function regcomp() returns zero on successful compilation or an error code otherwise.Function regexec() returns zero on match or REG_NOMATCH, if there were no matches.
