| = | Assignment |
| + | Addition |
| – | Subtraction |
| * | Multiplication |
| / | Division |
| % | Modulus |
| == | Equal To |
| != | Not Equal To |
| < | Less Than |
| > | Greater Than |
| <= | Less Than or Equal To |
| >= | Greater Than or Equal To |
| += | Plus Equals |
| -= | Minus Equals |
| *= | Multiply Equals |
| /= | Divide Equals |
| %= | Modulo Equals |
| .= | Concatenate Equals |
Tag Archives: PHP
mysql_connect() vs mysql_pconnect()
Difference between mysql_connect() and mysql_pconnect() PHP
mysql_pconnect() acts very much like mysql_connect() with two major differences.
When connecting using mysql_pconnect() , the function would first try to find a (persistent) link that’s already open with the same host, username and password. If one is found, an identifier for it will be returned instead of opening a new connection.
When connecting using mysql_connect(), the connection to the SQL server will not be closed when the execution of the script ends. Instead, the link will remain open for future use
Note :mysql_close() will not close links established by mysql_pconnect().
Difference between mysql_connect() and mysql_pconnect() PHP
Difference between mysql_connect() and mysql_pconnect() PHP
mysql_pconnect() acts very much like mysql_connect() with two major differences.
When connecting using mysql_pconnect() , the function would first try to find a (persistent) link that’s already open with the same host, username and password. If one is found, an identifier for it will be returned instead of opening a new connection.
When connecting using mysql_connect(), the connection to the SQL server will not be closed when the execution of the script ends. Instead, the link will remain open for future use
Note :mysql_close() will not close links established by mysql_pconnect().
Include() Vs Include_once()
Both functions includes the given file but Include_once() checks whether the given file is already included .As the name suggests , the file will be included only once .
Include() vs require()
include() will throw a warning and require() will throw a fatal error if the file is missing.
echo() vs print()
print() returns a value much like a normal function would but echo() does not
echo() runs faster than print()
Echo can take multiple parameters where as print cannot
Difference Between echo() and print() PHP
print() returns a value much like a normal function would but echo() does not
echo() runs faster than print()
Echo can take multiple parameters where as print cannot
Difference Between Include() and require() PHP
include() will throw a warning and require() will throw a fatal error if the file is missing.
Difference Between Include() and Include_once() PHP
Both functions includes the given file but Include_once() checks whether the given file is already included .As the name suggests , the file will be included only once .
CAPTCHA
A CAPTCHA is a type of challenge-response test used in computing as an attempt to ensure that the response is generated by a person. The process usually involves a computer asking a user to complete a simple test which the computer is able to grade. These tests are designed to be easy for a computer to generate, but difficult for a computer to solve, so that if a correct solution is received, it can be presumed to have been entered by a human. A common type of CAPTCHA requires the user to type letters or digits from a distorted image that appears on the screen, and such tests are commonly used to prevent unwanted internet bots from accessing websites.
The term “CAPTCHA” was coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford (all of Carnegie Mellon University). It is an acronym based on the word “capture” and standing for “Completely Automated Public Turing test to tell Computers and Humans Apart”. Carnegie Mellon University attempted to trademark the term, but the trademark application was abandoned on 21 April 2008.