11. How can we know the total number of elements of Array?
sizeof($array_var)
count($array_var)
If we just pass a simple var instead of a an array it will return 1.
12. What type of headers that PHP supports?
$_SERVER[‘HTTP_ACCEPT’]
13. How can we extract string ‘abc.com’ from a string ‘http://info@abc.com’ using regular_expression of php?
We can use the preg_match() function with “/.*@(.*)$/” as the regular expression pattern.
For example:
preg_match("/.*@(.*)$/","http://info@abc.com",$data);
echo $data[1];
?>
14. How can we create a database using php?
mysql_create_db();
15. Explain include(), include_once, require() and require_once.?
include()
The include() function takes all the content in a specified file and includes it in the current file. If an error occurs, the include() function generates a warning, but the script will continue execution.
include_once()
File will not be included more than once. If we want to include a file once only and further calling of the file will be ignored then we have to use the PHP function include_once().
require()
The require() function is identical to include(), except that it handles errors differently. The require() generates a fatal error, and the script will stop.
require_once()
The required file is called only once when a page is open and further calling of the file will be ignored.
16. What are the different types of errors in php?
Notices: These are trivial, non-critical errors that PHP encounters while executing a script - for example, accessing a variable that has not yet been defined. By default, such errors are not displayed to the user at all - although, as you will see, you can change this default behaviour.
Warnings: These are more serious errors - for example, attempting to include() a file which does not exist. By default, these errors are displayed to the user, but they do not result in script termination.
Fatal errors: These are critical errors - for example, instantiating an object of a non-existent class, or calling a non-existent function. These errors cause the immediate termination of the script, and PHP’s default behaviour is to display them to the user when they take place.
If we just pass a simple var instead of a an array it will return 1.
17. What are the Formatting and Printing Strings available in PHP?
Function Description
printf() Displays a formatted string
sprintf() Saves a formatted string in a variable
fprintf() Prints a formatted string to a file
number_format() Formats numbers as strings
18. How to find a length of a string?
strlen()
19. What is the functionality of the function strstr and stristr?
strstr() returns part of a given string from the first occurrence of a given substring to the end of the string.
For example:
strstr("user@example.com","@") will return "@example.com".
stristr() is idential to strstr() except that it is case insensitive.
20. How can we get second of the current time using date function?
$second = date(“s”);
?>
Share This :
sizeof($array_var)
count($array_var)
If we just pass a simple var instead of a an array it will return 1.
12. What type of headers that PHP supports?
$_SERVER[‘HTTP_ACCEPT’]
13. How can we extract string ‘abc.com’ from a string ‘http://info@abc.com’ using regular_expression of php?
We can use the preg_match() function with “/.*@(.*)$/” as the regular expression pattern.
For example:
preg_match("/.*@(.*)$/","http://info@abc.com",$data);
echo $data[1];
?>
14. How can we create a database using php?
mysql_create_db();
15. Explain include(), include_once, require() and require_once.?
include()
The include() function takes all the content in a specified file and includes it in the current file. If an error occurs, the include() function generates a warning, but the script will continue execution.
include_once()
File will not be included more than once. If we want to include a file once only and further calling of the file will be ignored then we have to use the PHP function include_once().
require()
The require() function is identical to include(), except that it handles errors differently. The require() generates a fatal error, and the script will stop.
require_once()
The required file is called only once when a page is open and further calling of the file will be ignored.
16. What are the different types of errors in php?
Notices: These are trivial, non-critical errors that PHP encounters while executing a script - for example, accessing a variable that has not yet been defined. By default, such errors are not displayed to the user at all - although, as you will see, you can change this default behaviour.
Warnings: These are more serious errors - for example, attempting to include() a file which does not exist. By default, these errors are displayed to the user, but they do not result in script termination.
Fatal errors: These are critical errors - for example, instantiating an object of a non-existent class, or calling a non-existent function. These errors cause the immediate termination of the script, and PHP’s default behaviour is to display them to the user when they take place.
If we just pass a simple var instead of a an array it will return 1.
17. What are the Formatting and Printing Strings available in PHP?
Function Description
printf() Displays a formatted string
sprintf() Saves a formatted string in a variable
fprintf() Prints a formatted string to a file
number_format() Formats numbers as strings
18. How to find a length of a string?
strlen()
19. What is the functionality of the function strstr and stristr?
strstr() returns part of a given string from the first occurrence of a given substring to the end of the string.
For example:
strstr("user@example.com","@") will return "@example.com".
stristr() is idential to strstr() except that it is case insensitive.
20. How can we get second of the current time using date function?
$second = date(“s”);
?>
0 comments:
Post a Comment