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<?php /* this is interned as a literal string */ $literal = 'o'; /* ord is not called, it's optimized away */ $ord = ord('o'); /* chr is called and returns the interned string */ $chr = chr($ord); var_dump($chr, is_literal($chr));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function is_literal() in /in/nJhc1:11 Stack trace: #0 {main} thrown in /in/nJhc1 on line 11
Process exited with code 255.

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