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<?php var_dump(is_numeric("1e3445")); var_dump("1e34d5" + 1); var_dump(is_numeric("1e34d5"));
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
bool(true) Warning: A non-numeric value encountered in /in/7DBh7 on line 4 float(1.0E+34) bool(false)
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
bool(true) Notice: A non well formed numeric value encountered in /in/7DBh7 on line 4 float(1.0E+34) bool(false)
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.3.32 - 7.3.33
bool(true) float(1.0E+34) bool(false)
Output for 4.3.3 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0
bool(false) float(1.0E+34) bool(false)
Output for 4.3.0 - 4.3.2
bool(false) float(1.E+34) bool(false)

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308.02 ms | 401 KiB | 459 Q