Fix issue #21. (int)"is" is equal to zero #22
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Faulty condition check only checks for string values. In some cases, `$skey` is integer 0, and PHP converts the string `"is"` to integer 0 to do an integer conversion, causing this `if` check to fail. Following code then dies due to faulty values used for offset.
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Faulty condition check only checks for string values. In some cases,
$skeyis integer 0, and PHP converts the string"is"to integer 0 to do an integer conversion, causing thisifcheck to fail. Following code then dies due to faulty values used for offset.