<?php
var_dump( filter_var(1, FILTER_VALIDATE_BOOLEAN) );
var_dump( (1) );
var_dump( !(!1) );
echo str_repeat('-', 30);
var_dump( filter_var('1', FILTER_VALIDATE_BOOLEAN) );
var_dump( filter_var(0, FILTER_VALIDATE_BOOLEAN) );
var_dump( filter_var('0', FILTER_VALIDATE_BOOLEAN) );
var_dump( filter_var(true, FILTER_VALIDATE_BOOLEAN) );
var_dump( filter_var(false, FILTER_VALIDATE_BOOLEAN) );
- Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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
- bool(true)
int(1)
bool(true)
------------------------------bool(true)
bool(false)
bool(false)
bool(true)
bool(false)
preferences:
199.47 ms | 403 KiB | 287 Q