--TEST--
Test strncmp() function : usage variations - binary safe(binary values)
--FILE--
<?php
/* Prototype  : int strncmp ( string $str1, string $str2, int $len );
 * Description: Binary safe case-sensitive string comparison of the first n characters
 * Source code: Zend/zend_builtin_functions.c
*/

/* Test strncmp() function with binary values passed to 'str1' & 'str2' and with the null terminated strings */

echo "*** Test strncmp() function: with binary inputs ***\n";

echo "\n-- Checking with all 256 characters given, in binary format --\n";
/* A binary function should work with all 256 characters that a character(8-bit) can take */
/* loop through to get all 256 character's equivalent binary value, and check working of strncmp() */
$count = 1;
for($ASCII = 0; $ASCII <= 255; $ASCII++) {
  $str1 = decbin($ASCII);  //ASCII value in binary form
  $str2 = decbin( ord( chr($ASCII) ) );  //Getting equivalent ASCII value for the character in binary form
  echo "-- Iteration $count --\n";
  var_dump( strncmp($str1, $str2, 8) );  //comparing all the 8-bits; expected: int(0)
  var_dump( strncmp($str1, $str2, 4) );  //comparing only 4-bits; expected: int(0)
  $count++;
}

echo "\n-- Checking with out of character's range, given in binary format --\n";
/* Checking with the out of range ASCII value(given in binary format) */
$str1 = decbin(256);
$str2 = decbin( ord( chr(256) ));
var_dump( strncmp($str1, $str2, 8) );  //comparing all the 8-bits; expected: int(1)

echo "\n*** Done ***\n";
?>
--EXPECT--
*** Test strncmp() function: with binary inputs ***

-- Checking with all 256 characters given, in binary format --
-- Iteration 1 --
int(0)
int(0)
-- Iteration 2 --
int(0)
int(0)
-- Iteration 3 --
int(0)
int(0)
-- Iteration 4 --
int(0)
int(0)
-- Iteration 5 --
int(0)
int(0)
-- Iteration 6 --
int(0)
int(0)
-- Iteration 7 --
int(0)
int(0)
-- Iteration 8 --
int(0)
int(0)
-- Iteration 9 --
int(0)
int(0)
-- Iteration 10 --
int(0)
int(0)
-- Iteration 11 --
int(0)
int(0)
-- Iteration 12 --
int(0)
int(0)
-- Iteration 13 --
int(0)
int(0)
-- Iteration 14 --
int(0)
int(0)
-- Iteration 15 --
int(0)
int(0)
-- Iteration 16 --
int(0)
int(0)
-- Iteration 17 --
int(0)
int(0)
-- Iteration 18 --
int(0)
int(0)
-- Iteration 19 --
int(0)
int(0)
-- Iteration 20 --
int(0)
int(0)
-- Iteration 21 --
int(0)
int(0)
-- Iteration 22 --
int(0)
int(0)
-- Iteration 23 --
int(0)
int(0)
-- Iteration 24 --
int(0)
int(0)
-- Iteration 25 --
int(0)
int(0)
-- Iteration 26 --
int(0)
int(0)
-- Iteration 27 --
int(0)
int(0)
-- Iteration 28 --
int(0)
int(0)
-- Iteration 29 --
int(0)
int(0)
-- Iteration 30 --
int(0)
int(0)
-- Iteration 31 --
int(0)
int(0)
-- Iteration 32 --
int(0)
int(0)
-- Iteration 33 --
int(0)
int(0)
-- Iteration 34 --
int(0)
int(0)
-- Iteration 35 --
int(0)
int(0)
-- Iteration 36 --
int(0)
int(0)
-- Iteration 37 --
int(0)
int(0)
-- Iteration 38 --
int(0)
int(0)
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int(0)
int(0)
-- Iteration 40 --
int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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-- Iteration 93 --
int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
-- Iteration 162 --
int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
-- Iteration 166 --
int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
int(0)
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int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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int(0)
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-- Iteration 248 --
int(0)
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int(0)
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-- Iteration 250 --
int(0)
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int(0)
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-- Iteration 252 --
int(0)
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-- Iteration 253 --
int(0)
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-- Iteration 254 --
int(0)
int(0)
-- Iteration 255 --
int(0)
int(0)
-- Iteration 256 --
int(0)
int(0)

-- Checking with out of character's range, given in binary format --
int(1)

*** Done ***