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<?php var_dump(strstr('\/\/', 'https://school.nestonline.jp/')); var_dump(strpos('/','\/\///')); var_dump("\500");
Output for 7.1.0
Warning: Octal escape sequence overflow \500 is greater than \377 in /in/JPUhM on line 4 bool(false) bool(false) string(1) "@"
Output for 4.3.0 - 7.0.14
bool(false) bool(false) string(1) "@"