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<?=($a=bcpow(9,99,45).x)^($b=[].new Exception), $a, $b;
Output for 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught Error: Undefined constant "x" in /in/XZCPY:1 Stack trace: #0 {main} thrown in /in/XZCPY on line 1
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught Error: Undefined constant "x" in /in/XZCPY:1 Stack trace: #0 {main} thrown in /in/XZCPY on line 1
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13
Fatal error: Uncaught Error: Call to undefined function bcpow() in /in/XZCPY:1 Stack trace: #0 {main} thrown in /in/XZCPY on line 1
Process exited with code 255.
Output for 7.4.0 - 7.4.32
Warning: Use of undefined constant x - assumed 'x' (this will throw an Error in a future version of PHP) in /in/XZCPY on line 1 Notice: Array to string conversion in /in/XZCPY on line 1 sKGPKsNVQCD_Z\\\QYkn{`k;jCVP]EFRV\=L]UZVN29512665430652752148753480226197736314359272517043832886063884637676943433478020332709411004889.000000000000000000000000000000000000000000000xArrayException in /in/XZCPY:1 Stack trace: #0 {main}
Output for 7.3.0 - 7.3.31
Notice: Array to string conversion in /in/XZCPY on line 1 Warning: Use of undefined constant x - assumed 'x' (this will throw an Error in a future version of PHP) in /in/XZCPY on line 1 sKGPKsNVQCD_Z\\\QYkn{`k;jCVP]EFRV\=L]UZVN29512665430652752148753480226197736314359272517043832886063884637676943433478020332709411004889.000000000000000000000000000000000000000000000xArrayException in /in/XZCPY:1 Stack trace: #0 {main}
Output for 7.2.0 - 7.2.33
Notice: Array to string conversion in /in/XZCPY on line 1 Warning: Use of undefined constant x - assumed 'x' (this will throw an Error in a future version of PHP) in /in/XZCPY on line 1 sKGPKsNVQCD_Z\\\QYkn{`k;jCVP]EFRV\=L]UZVN29512665430652752148753480226197736314359272517043832886063884637676943433478020332709411004889xArrayException in /in/XZCPY:1 Stack trace: #0 {main}
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Array to string conversion in /in/XZCPY on line 1 Notice: Use of undefined constant x - assumed 'x' in /in/XZCPY on line 1 sKGPKsNVQCD_Z\\\QYkn{`k;jCVP]EFRV\=L]UZVN29512665430652752148753480226197736314359272517043832886063884637676943433478020332709411004889xArrayException in /in/XZCPY:1 Stack trace: #0 {main}
Output for 5.6.0 - 5.6.38
Notice: Use of undefined constant x - assumed 'x' in /in/XZCPY on line 1 Notice: Array to string conversion in /in/XZCPY on line 1 sKGPKSNVQCD_Z\wIW]GAZ[V[X^Ynirdj8dFTR\@AYPW2HUY]XN29512665430652752148753480226197736314359272517043832886063884637676943433478020332709411004889xArrayexception 'Exception' in /in/XZCPY:1 Stack trace: #0 {main}
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Fatal error: Call to undefined function bcpow() in /in/XZCPY on line 1
Process exited with code 255.

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