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<?php function make_uppercase(&$word) { $word = strtoupper ($word); return true; } $fish = array ( "hampala ampalong", "hampala macrolipedota" ); print_r ( array_filter ( $fish, "make_uppercase" ) );
Output for git.master, git.master_jit, rfc.property-hooks
Warning: make_uppercase(): Argument #1 ($word) must be passed by reference, value given in /in/ac1ZT on line 12 Warning: make_uppercase(): Argument #1 ($word) must be passed by reference, value given in /in/ac1ZT on line 12 Array ( [0] => hampala ampalong [1] => hampala macrolipedota )

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