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@ 2018-01-31T08:23:59Z

<?php

var_dump(
    filter_var(true, FILTER_VALIDATE_FLOAT),
    filter_var(false, FILTER_VALIDATE_FLOAT),
    filter_var(1.1, FILTER_VALIDATE_FLOAT),
    filter_var(0.0, FILTER_VALIDATE_FLOAT),
    filter_var('0', FILTER_VALIDATE_FLOAT),
    filter_var('-0.0', FILTER_VALIDATE_FLOAT)
);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
filter_var: documentation ( source)

preferences:dark modelive preview

36.3 ms | 402 KiB | 5 Q