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<?php var_dump('0d9' + 1); // int(1) $foo = '0d9'; $foo += 1; var_dump($foo); // int(1) $foo = '0d9'; $foo++; var_dump($foo); // string(3) "0e0"
Output for 8.5.0 - 8.5.2
Warning: A non-numeric value encountered in /in/c4h3N on line 2 int(1) Warning: A non-numeric value encountered in /in/c4h3N on line 3 int(1) Deprecated: Increment on non-numeric string is deprecated, use str_increment() instead in /in/c4h3N on line 4 string(3) "0e0"
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.29, 8.4.1 - 8.4.14, 8.4.16
Warning: A non-numeric value encountered in /in/c4h3N on line 2 int(1) Warning: A non-numeric value encountered in /in/c4h3N on line 3 int(1) string(3) "0e0"
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: A non well formed numeric value encountered in /in/c4h3N on line 2 int(1) Notice: A non well formed numeric value encountered in /in/c4h3N on line 3 int(1) string(3) "0e0"
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.3.32 - 7.3.33
int(1) int(1) string(3) "0e0"

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