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<?php ${" "} = "blank space"; ${"123"} = 456; var_dump(${" "},${"123"}); $a = get_defined_vars(); echo array_key_exists(" ",$a)? "Yes" : "No","\n"; echo array_key_exists("123",$a)? "Yes" : "No";
Output for git.master, git.master_jit, rfc.property-hooks
string(11) "blank space" int(456) Yes No

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