3v4l.org

run code in 300+ PHP versions simultaneously
<?php ini_set('precision', -1); echo ini_get('precision') . PHP_EOL; var_dump(0.1+0.7); var_dump((0.1+0.7)===0.8); echo "\n"; ini_set('precision', 1); echo ini_get('precision') . PHP_EOL; var_dump(0.1+0.7); var_dump((0.1+0.7)===0.8); echo "\n"; ini_set('precision', 10); echo ini_get('precision') . PHP_EOL; var_dump(0.1+0.7); var_dump((0.1+0.7)===0.8); echo "\n"; ini_set('precision', 100); echo ini_get('precision') . PHP_EOL; var_dump(0.1+0.7); var_dump((0.1+0.7)===0.8);
Output for 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
-1 float(0.7999999999999999) bool(false) 1 float(0.7999999999999999) bool(false) 10 float(0.7999999999999999) bool(false) 100 float(0.7999999999999999) bool(false)
Output for 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
-1 float(0.7999999999999999) bool(false) 1 float(0.8) bool(false) 10 float(0.8) bool(false) 100 float(0.79999999999999993338661852249060757458209991455078125) bool(false)
preferences:
146.97 ms | 408 KiB | 5 Q