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<?php $var="20070601"; if (intval ($var)) echo "it 's safe"; echo $var="". $var; echo ""; $var1="1 union select 1,1,1 from admin"; if (intval ($var1)) echo "it 's safe"; echo '$var1='. $var1; ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
it 's safe20070601it 's safe$var1=1 union select 1,1,1 from admin
preferences:
369.2 ms | 406 KiB | 460 Q