Wednesday, 21 December 2016

What are special characters? and how to remove special characters?

What are special characters? and how to remove special characters?

Question: What are special characters?
Special characters are selected punctuation characters present on standard US keyboard.


Question: Provide list of special characters?
Character Name
Space
 ! Exclamation
" Double quote
# Number sign (hash)
$ Dollar sign
 % Percent
& Ampersand
' Single quote
( Left parenthesis
) Right parenthesis
* Asterisk
+ Plus
, Comma
- Minus
. Full stop
/ Slash
 : Colon
 ; Semicolon
< Less than
= Equal sign
> Greater than
 ? Question mark
@ At sign
[ Left bracket
\ Backslash
] Right bracket
^ Caret
_ Underscore
` Grave accent (backtick)
{ Left brace
| Vertical bar
} Right brace
~ Tilde



Question: How to remove special characters from string including space?
$string='test !@#ing';
echo preg_replace('/[^A-Za-z0-9\-]/', '', $string);



Question: How to remove special characters from string except space?
$string='test !@#ing';
echo preg_replace('/[^A-Za-z0-9\-\s]/', '', $string);



Question: How to replace special characters with hyphen?
$string='test !@#ing';
echo preg_replace('/[^A-Za-z0-9\-\s]/', '-', $string);



Question: How to replace multiple hyphen with single hyphen?
$string='test-----ing';
echo preg_replace('/-+/', '-',$string);



Question: How to remove special characters from array?
$array=array('test !@#ing','sdalkjsad','#$#33');
function cleanData($string){
return preg_replace('/[^A-Za-z0-9\-]/', '', $string);
}
$array = array_map('cleanData',$array);
print_r($array);



Question: How to remove all special characters from javascript?
var stringToReplace='test !@#ing';
stringToReplace=stringToReplace.replace(/[^\w\s]/gi, '')


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