<?php
echo strlen("Hello world!"); // outputs 12
?>
<?php
echo str_word_count("Hello world!"); // outputs 2
?>
<?php
echo strrev("Hello world!"); // outputs !dlrow olleH
?>
<?php
echo strpos("Hello world!", "world"); // outputs 6
?>
<?php
echo str_replace("world", "Dolly", "Hello world!"); // outputs Hello Dolly!
?>
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