8.10. Comparing Index Values
You can compare two index values by using the compare method.
$text->compare(index1, op, index2);
You pass the first index, the test operation to perform, and the second index. The values for op are: "<", "<=", "==", ">=", and "!=". The function returns 1 if the test was true and if it wasn't. The call
$status = $text->compare("1.0", "<=", "end");
returns a 1 because the index "1.0" is less than "end".
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