1 files changed, 303 insertions, 0 deletions
diff --git a/ext/standard/tests/general_functions/is_string.phpt b/ext/standard/tests/general_functions/is_string.phpt
new file mode 100644
index 0000000..b8c82b1
--- /dev/null
+++ b/ext/standard/tests/general_functions/is_string.phpt
@@ -0,0 +1,303 @@
+--TEST--
+Test is_string() function
+--FILE--
+<?php
+/* Prototype: bool is_string ( mixed $var );
+ * Description: Finds whether the given variable is a string
+ */
+
+echo "*** Testing is_string() with valid string values ***\n";
+// different valid strings 
+
+/* string created using Heredoc (<<<) */
+$heredoc_string = <<<EOT
+This is string defined
+using heredoc.
+EOT;
+/* heredoc string with only numerics */
+$heredoc_numeric_string = <<<EOT
+123456 3993
+4849 string 
+EOT;
+/* null heardoc string */
+$heredoc_empty_string = <<<EOT
+EOT;
+$heredoc_null_string = <<<EOT
+NULL
+EOT;
+
+$strings = array(
+  "",
+  " ",
+  '',
+  ' ',
+  "string",
+  'string',
+  "NULL",
+  'null',
+  "FALSE",
+  'true',
+  "\x0b",
+  "\0",
+  '\0',
+  '\060',
+  "\070",
+  "0x55F",
+  "055",
+  "@#$#$%%$^^$%^%^$^&",
+  $heredoc_string,
+  $heredoc_numeric_string,
+  $heredoc_empty_string,
+  $heredoc_null_string
+);
+/* loop to check that is_string() recognizes different 
+   strings, expected output bool(true) */
+$loop_counter = 1;
+foreach ($strings as $string ) {
+  echo "-- Iteration $loop_counter --\n"; $loop_counter++;
+  var_dump( is_string($string) );
+}
+
+echo "\n*** Testing is_string() on non string values ***\n";
+
+// get a resource type variable
+$fp = fopen (__FILE__, "r");
+$dfp = opendir ( dirname(__FILE__) );
+
+// unset vars
+$unset_string1 = "string";
+$unset_string2 = 'string';
+$unset_heredoc = <<<EOT
+this is heredoc string
+EOT;
+// unset the vars 
+unset($unset_string1, $unset_string2, $unset_heredoc);
+
+// other types in a array 
+$not_strings = array (
+  /* integers */
+  0,
+  1,
+  -1,
+  -0,
+  543915,
+  -5322,
+  0x0,
+  0x1,
+  0x55F,
+  -0xCCF,
+  0123,
+  -0654,
+  00,
+  01,
+
+  /* floats */
+  0.0,
+  1.0,
+  -1.0,
+  10.0000000000000000005,
+  .5e6,
+  -.5E7,
+  .5E+8,
+  -.5e+90,
+  1e5,
+  -1e5,
+  1E5,
+  -1E7,
+
+  /* objects */
+  new stdclass,
+
+  /* resources */
+  $fp,
+  $dfp,
+
+  /* arrays */
+  array(),
+  array(0),
+  array(1),
+  array(NULL),
+  array(null),
+  array("string"),
+  array(true),
+  array(TRUE),
+  array(false),
+  array(FALSE),
+  array(1,2,3,4),
+  array(1 => "One", "two" => 2),
+
+  /* undefined and unset vars */
+  @$unset_string1,
+  @$unset_string2,
+  @$unset_heredoc,
+  @$undefined_var 
+);
+/* loop through the $not_strings to see working of 
+   is_string() on non string types, expected output bool(false) */
+$loop_counter = 1;
+foreach ($not_strings as $type ) {
+  echo "-- Iteration $loop_counter --\n"; $loop_counter++;
+  var_dump( is_string($type) );
+}
+
+echo "\n*** Testing error conditions ***\n";
+//Zero argument
+var_dump( is_string() );
+
+//arguments more than expected 
+var_dump( is_string("string", "test") );
+ 
+echo "Done\n";
+
+// close the resources used
+fclose($fp);
+closedir($dfp);
+
+?>
+--EXPECTF--
+*** Testing is_string() with valid string values ***
+-- Iteration 1 --
+bool(true)
+-- Iteration 2 --
+bool(true)
+-- Iteration 3 --
+bool(true)
+-- Iteration 4 --
+bool(true)
+-- Iteration 5 --
+bool(true)
+-- Iteration 6 --
+bool(true)
+-- Iteration 7 --
+bool(true)
+-- Iteration 8 --
+bool(true)
+-- Iteration 9 --
+bool(true)
+-- Iteration 10 --
+bool(true)
+-- Iteration 11 --
+bool(true)
+-- Iteration 12 --
+bool(true)
+-- Iteration 13 --
+bool(true)
+-- Iteration 14 --
+bool(true)
+-- Iteration 15 --
+bool(true)
+-- Iteration 16 --
+bool(true)
+-- Iteration 17 --
+bool(true)
+-- Iteration 18 --
+bool(true)
+-- Iteration 19 --
+bool(true)
+-- Iteration 20 --
+bool(true)
+-- Iteration 21 --
+bool(true)
+-- Iteration 22 --
+bool(true)
+
+*** Testing is_string() on non string values ***
+-- Iteration 1 --
+bool(false)
+-- Iteration 2 --
+bool(false)
+-- Iteration 3 --
+bool(false)
+-- Iteration 4 --
+bool(false)
+-- Iteration 5 --
+bool(false)
+-- Iteration 6 --
+bool(false)
+-- Iteration 7 --
+bool(false)
+-- Iteration 8 --
+bool(false)
+-- Iteration 9 --
+bool(false)
+-- Iteration 10 --
+bool(false)
+-- Iteration 11 --
+bool(false)
+-- Iteration 12 --
+bool(false)
+-- Iteration 13 --
+bool(false)
+-- Iteration 14 --
+bool(false)
+-- Iteration 15 --
+bool(false)
+-- Iteration 16 --
+bool(false)
+-- Iteration 17 --
+bool(false)
+-- Iteration 18 --
+bool(false)
+-- Iteration 19 --
+bool(false)
+-- Iteration 20 --
+bool(false)
+-- Iteration 21 --
+bool(false)
+-- Iteration 22 --
+bool(false)
+-- Iteration 23 --
+bool(false)
+-- Iteration 24 --
+bool(false)
+-- Iteration 25 --
+bool(false)
+-- Iteration 26 --
+bool(false)
+-- Iteration 27 --
+bool(false)
+-- Iteration 28 --
+bool(false)
+-- Iteration 29 --
+bool(false)
+-- Iteration 30 --
+bool(false)
+-- Iteration 31 --
+bool(false)
+-- Iteration 32 --
+bool(false)
+-- Iteration 33 --
+bool(false)
+-- Iteration 34 --
+bool(false)
+-- Iteration 35 --
+bool(false)
+-- Iteration 36 --
+bool(false)
+-- Iteration 37 --
+bool(false)
+-- Iteration 38 --
+bool(false)
+-- Iteration 39 --
+bool(false)
+-- Iteration 40 --
+bool(false)
+-- Iteration 41 --
+bool(false)
+-- Iteration 42 --
+bool(false)
+-- Iteration 43 --
+bool(false)
+-- Iteration 44 --
+bool(false)
+-- Iteration 45 --
+bool(false)
+
+*** Testing error conditions ***
+
+Warning: is_string() expects exactly 1 parameter, 0 given in %s on line %d
+bool(false)
+
+Warning: is_string() expects exactly 1 parameter, 2 given in %s on line %d
+bool(false)
+Done