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<?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('', FILTER_VALIDATE_FLOAT) );
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
float(1) bool(false) float(1.1) float(0) float(0) bool(false)

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161.05 ms | 403 KiB | 154 Q