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--TEST-- Test strrchr() function : usage variations - double quoted strings --FILE-- <?php /* Prototype : string strrchr(string $haystack, string $needle); * Description: Finds the last occurrence of a character in a string. * Source code: ext/standard/string.c */ /* Test strrchr() function by passing various double quoted strings for 'haystack' & 'needle' */ echo "*** Testing strrchr() function: with various double quoted strings ***"; $haystack = "Hello,\t\n\0\n $&!#%\o,()*+-./:;<=>?@hello123456he \x234 \101 "; $needle = array( //regular strings "l", "L", "HELLO", "hEllo", //escape characters "\t", "\T", " ", "\n", "\N", " ", //new line //nulls "\0", NULL, null, //boolean false FALSE, false, //empty string "", //special chars " ", "$", " $", "&", "!#", "%\o", "\o,", "()", "*+", "+", "-", ".", ".;", ":;", ";", "<=>", ">", "=>", "?", "@", "@hEllo", "12345", //decimal numeric string "\x23", //hexadecimal numeric string "#", //respective ASCII char of \x23 "\101", //octal numeric string "A", //respective ASCII char of \101 "456HEE", //numerics + chars 42, //needle as int(ASCII value of "*") $haystack //haystack as needle ); /* loop through to get the position of the needle in haystack string */ $count = 1; for($index=0; $index<count($needle); $index++) { echo "\n-- Iteration $count --\n"; var_dump( strrchr($haystack, $needle[$index]) ); $count++; } echo "*** Done ***"; ?> --EXPECTF-- *** Testing strrchr() function: with various double quoted strings *** -- Iteration 1 -- string(16) "lo123456he #4 A " -- Iteration 2 -- bool(false) -- Iteration 3 -- string(53) "Hello, $&!#%\o,()*+-./:;<=>?@hello123456he #4 A " -- Iteration 4 -- string(8) "he #4 A " -- Iteration 5 -- string(47) " $&!#%\o,()*+-./:;<=>?@hello123456he #4 A " -- Iteration 6 -- string(36) "\o,()*+-./:;<=>?@hello123456he #4 A " -- Iteration 7 -- string(47) " $&!#%\o,()*+-./:;<=>?@hello123456he #4 A " -- Iteration 8 -- string(44) " $&!#%\o,()*+-./:;<=>?@hello123456he #4 A " -- Iteration 9 -- string(36) "\o,()*+-./:;<=>?@hello123456he #4 A " -- Iteration 10 -- string(44) " $&!#%\o,()*+-./:;<=>?@hello123456he #4 A " -- Iteration 11 -- string(45) "