Description:
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Hi guys,
See example of bug you will understand. 
If this is normal in PHP is very strange. Thanks.

Test script:
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<?php
$letters = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z');

print 0 == $letters[0] ? $letters[0] : 'false';
print 0 == $letters[1] ? $letters[1] : 'false';
print 0 == $letters[2] ? $letters[2] : 'false';
print 0 == $letters[3] ? $letters[3] : 'false';
print 0 == $letters[4] ? $letters[4] : 'false';

Expected result:
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falsefalsefalsefalsefalse

Actual result:
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abcde