Given a string which contains printable and not-printable characters. The task is to remove all non-printable characters from the string. Space ( ) is first printable char and tilde (~) is last printable ASCII characters. So the task is to replace all characters which do fall in that range means to take only those char which occur in range(32-127). This task is done by only different type regex expression.
Example:
Input: str = "\n\nGeeks \n\n\n\tfor Geeks\n\t" Output: Geeks for Geeks
Note: Newline (\n) and tab (\t) are commands not printable character.
Method 1: Using general regular expression: There are many regex available. The best solution is to strip all non-ASCII characters from the input string, that can be done with this preg_replace.
Example:
php
<?PHP// PHP program to remove all non-printable// character from string// String with non printable characters$str = "Geeks šžfor ÂGee\tks\n";// Using preg_replace method to remove all // non-printable character from string$str = preg_replace('/[\x00-\x1F\x80-\xFF]/', '', $str);// Display the modify stringecho($str);?> |
Geeks for Geeks
Method 2: Use the ‘print’ regex: Other possible solution is to use the print regular expression. The [:print:] regular expression stands for “any printable character”.
Example:
php
<?PHP// PHP program to remove all non-printable// character from string// String with non printable char$str = "Geeks šžfor ÂGee\tks\n";// Using preg_replace method to remove all // non-printable character from string$str = preg_replace('/[[:^print:]]/', '', $str);// Display modify stringecho($str);?> |
Geeks for Geeks
