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<?php $f= fn($a)=>preg_replace('/\d+/','^{$0}',normalizer_normalize("\\$$a\\$",8)); echo $f('x')."\n"; echo $f('xyz')."\n"; echo $f('x²')."\n"; echo $f('x²¹')."\n"; echo $f('x²yz²')."\n"; echo $f('xy¹¹z')."\n"; echo $f('x⁴')."\n"; echo $f('x⁶⁰')."\n";
Output for 7.4.0 - 7.4.25, 7.4.27, 8.0.0 - 8.0.12, 8.0.14 - 8.0.15, 8.1.0 - 8.1.2
\$x\$ \$xyz\$ \$x^{2}\$ \$x^{21}\$ \$x^{2}yz^{2}\$ \$xy^{11}z\$ \$x^{4}\$ \$x^{60}\$
Output for 7.4.26, 8.0.13
Fatal error: Uncaught Error: Call to undefined function normalizer_normalize() in /in/mJZKd:3 Stack trace: #0 /in/mJZKd(5): {closure}('x') #1 {main} thrown in /in/mJZKd on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW) in /in/mJZKd on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_DOUBLE_ARROW in /in/mJZKd on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_DOUBLE_ARROW in /in/mJZKd on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/mJZKd on line 3
Process exited with code 255.

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