php
$third = $first;
$third .=$second;
echo $third; #appending the string to variable
echo strtolower($third);
echo strtoupper($third);
echo ucfirst($third); #firs letter of the string is capital
echo ucwords($third); #first letter of words are capital case
##looping
##
<?php
$count=0;
?>
#########url encoding it is legacy
get request is saved in $_GET =associative array
urlencode is for get request only
alphanumeric,underscore and dash is unchanged
reserved chars become %+2digit hexadecimal
reserved chars are !@#$%^&*()?.,; etc not <,>
space become +
#####rawurlencode
similar to urlencode
space become %20
Rawurlencode is more compatible generally
urlencode: use it to encode the query string
-Query string is part after the "?"
=Space are better encoded as "+"
rawurlencode:
use it on path ,portion comes before the "?"
space must be encoded as %20
(help ful for apache and filesystem to find the page filesystem)
htmlspecialchars($string1)
include() = Dont throw error if files is not found[continued script]
require() = Throws error if file is not found[script stopped]
include_once()
###cookies
cookies can store up to 4000 characters maximum to store
cookies are stored in client browser
#pros of session:-
more storage
smaller request sizes(only sessionid is sent instead of eg 4000 char cookie)
conceal datavalues, more secure and less hackable
#cons of session
-slower to access
-expire when browser is closed
-session files accumulate
mysql_fetch_row
-result are in standard array-key are integers
mysqli_fetch_assoc
-result are in associative array
-key are column names
mysqli_fetch_array
-result are in array or associative array
-mysql_num,mysql_assoc,mysql_both
Recommended is mysqli_fetch_assoc [easier]
$name1="test2";
$value1=25;
$expire1 = time() + (60*60*24*7); #1week
setcookie($name1,$value1,$expire1);
//setcookie ($nameofcookie,$valueofcookie,$expirydateofcookie)
$test = isset($_COOKIE["test"]) ? $_COOKIE["test"] : "";
## unset cookies
setcookie($name, null, time()-3600)
###########
mysqli_fetch_row
=results are in a standard array
=keys are integers
mysqli_fetch_assoc
=result are in an associative array
=keys are column names
mysqli_fetch_array
=result are in either or both types of arrays
=MYSQL_NUM,MYSQL_ASSOC,MYSQL_BOTH
$third = $first;
$third .=$second;
echo $third; #appending the string to variable
echo strtolower($third);
echo strtoupper($third);
echo ucfirst($third); #firs letter of the string is capital
echo ucwords($third); #first letter of words are capital case
##looping
##
<?php
$count=0;
?>
#########url encoding it is legacy
get request is saved in $_GET =associative array
urlencode is for get request only
alphanumeric,underscore and dash is unchanged
reserved chars become %+2digit hexadecimal
reserved chars are !@#$%^&*()?.,; etc not <,>
space become +
#####rawurlencode
similar to urlencode
space become %20
Rawurlencode is more compatible generally
urlencode: use it to encode the query string
-Query string is part after the "?"
=Space are better encoded as "+"
rawurlencode:
use it on path ,portion comes before the "?"
space must be encoded as %20
(help ful for apache and filesystem to find the page filesystem)
htmlspecialchars($string1)
include() = Dont throw error if files is not found[continued script]
require() = Throws error if file is not found[script stopped]
include_once()
###cookies
cookies can store up to 4000 characters maximum to store
cookies are stored in client browser
#pros of session:-
more storage
smaller request sizes(only sessionid is sent instead of eg 4000 char cookie)
conceal datavalues, more secure and less hackable
#cons of session
-slower to access
-expire when browser is closed
-session files accumulate
mysql_fetch_row
-result are in standard array-key are integers
mysqli_fetch_assoc
-result are in associative array
-key are column names
mysqli_fetch_array
-result are in array or associative array
-mysql_num,mysql_assoc,mysql_both
Recommended is mysqli_fetch_assoc [easier]
$name1="test2";
$value1=25;
$expire1 = time() + (60*60*24*7); #1week
setcookie($name1,$value1,$expire1);
//setcookie ($nameofcookie,$valueofcookie,$expirydateofcookie)
$test = isset($_COOKIE["test"]) ? $_COOKIE["test"] : "";
## unset cookies
setcookie($name, null, time()-3600)
###########
mysqli_fetch_row
=results are in a standard array
=keys are integers
mysqli_fetch_assoc
=result are in an associative array
=keys are column names
mysqli_fetch_array
=result are in either or both types of arrays
=MYSQL_NUM,MYSQL_ASSOC,MYSQL_BOTH
