PHP String Test – 2

1. Which one of the following functions will convert a string to all uppercase?

2. What will be the output of the following PHP code?

    <?php
    $author = "[email protected]";
    $author = str_replace("a","@",$author);
    echo "Contact the author of this article at $author.";
    ?>

3. How many functions does PHP offer for searching and modifying strings using Perl-compatible regular expressions.

4. Say we have two compare two strings which of the following function/functions can you use?

i) strcmp() 
ii) strcasecmp()
iii) strspn() 
iv) strcspn()

5. What will be the output of the following PHP code?

    <?php
    $url = "[email protected]";
    echo ltrim(strstr($url, "@"),"@");
    ?>

6. What will be the output of the following PHP code?

    <?php
    $foods = array("pasta", "steak", "fish", "potatoes");
    $food = preg_grep("/^s/", $foods);
    print_r($food);
    ?>

7. Which one of the following functions can be used to concatenate array elements to form a single delimited string?

8. What will be the output of the following PHP code?

    <?php
    $title = "O'malley wins the heavyweight championship!";
    echo ucwords($title);
    ?>

9. Which one of the following functions finds the last occurrence of a string, returning its numerical position?

10. What will be the output of the following PHP code?

    <?php
    echo str_pad("Salad", 5)." is good.";
    ?>