3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( (float) 'NAN' ); var_dump( (float) 'NaN' ); var_dump( (float) 'nan' ); var_dump( (float) ' NAN' ); var_dump( (float) 'NAN ' ); var_dump( (float) ' NAN ' ); var_dump( (float) 'foo' );
Output for 5.6.0 - 5.6.27, 7.0.20, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
float(0) float(0) float(0) float(0) float(0) float(0) float(0)
Output for 7.0.0 - 7.0.12
float(NAN) float(NAN) float(NAN) float(NAN) float(NAN) float(NAN) float(0)
preferences:
140.74 ms | 407 KiB | 5 Q