3350
What does $search mean in the strpos($str, $search) function?
A symbol, for which the function searches in the $str string and returns 0, if the symbol is not found
A substring or a symbol, to which position the function returns in the $str string
A string, in which the function searches for the $str symbol
What's the difference between strpos() and mb_strpos()?
The mb_strpos() function doesn't exist
strpos()searches for occurrence from the beginning of a string, and mb_strpos() – to the end
It’s better to use mb_strpos() for Cyrillic characters
For what is the strrpos() function?
Search for the first occurrence of a substring or a symbol in a string
Memory size, which a string occupies
Search for the last occurrence of a substring or a symbol in a string
What does the trim($str) function delete?
Starting and ending spaces
Starting and ending spaces, symbols '\n', '\r', '\t'
All spaces and symbols '\n', '\r', '\t'
What function converts a string into lowercase?
strtolower
strdown
lowstr
What does the strlen() function return?
Memory size, which a string occupies
The number of symbols in a string
The same string but with no numbers
What function can substract symbols from 3 to 10 inclusively in the $srt string?
substr($str, 2, 8);
substr($str, 3, 8);
substr($str, 3, 7);
What does the str_replace($old, $new, $input) function do?
Replaces the $old string with the $new string writing it into the $input variable
Replaces $old symbols with $new symbols in the $input string
Deletes $old symbols and adds $new symbols in the end of the $input string
What function is equivalent to the $rtrim() function?
ltrim();
right_trim();
chop();
For what the is htmlspecialchars function?
To transform symbols, which have a special value in HTML
To process symbols not used in HTML
To delete symbols, which have a special value in HTML
What will the strstr("http://www.mysite.com", "w") function return?
true
www
www.mysite.com
What's the difference between stristr() and strstr()?
No difference
strstr() is not case sensitive
stristr() is not case sensitive
What will be written in the $var variable as a result of this code execution: $var = strspn("Number 30 is less than number 450", "1234567890");?
3
3045
30
For what is wordwrap function used?
String cutting to a given number of characters
String wrapping to a given number of characters
Deletion of the specified number of symbols from the end of a string
What action does the strip_tags() function carry out?
Deletes HTML tags from a string
Deletes symbols < and > from a string
Leaves only HTML tags in a string
You know the subject at initial level
Probably, you haven't yet managed to learn the most important functions to be able to work with strings. Make sure to devote more time to the subject! For better understanding, we recommend that you to solve problems on the subject and, of course, to learn the theory. Good luck! Share the quiz with friends and check their knowledge :)
You know the subject at middle level
You can properly work with strings, but there are problems, which can bring you to your wit's end. Don't be upset! Remember your mistakes, learn theory and solve a few problems and you'll definitely succeed! Share the quiz with friends and check their knowledge :)
You know the subject perfectly
You're a master of work with strings in PHP. We can only congratulate you :) You can shift to learning new subjects! Share the quiz with friends and check their knowledge :)
