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<?php var_dump( '987654321123456789987654321123456789', (int) '987654321123456789987654321123456789', (float) '987654321123456789987654321123456789'); if('987654321123456789987654321123456789'=='987654321123456789876543210012345698'){ echo 'Why this condition is true?'; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(36) "987654321123456789987654321123456789" int(9223372036854775807) float(9.876543211234567E+35)
Output for 5.4.4 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
string(36) "987654321123456789987654321123456789" int(9223372036854775807) float(9.8765432112346E+35)
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.3
string(36) "987654321123456789987654321123456789" int(9223372036854775807) float(9.8765432112346E+35) Why this condition is true?

preferences:
200.51 ms | 403 KiB | 314 Q