--- /dev/null
+--TEST--
+Test htmlspecialchars() function : basic functionality
+--FILE--
+<?php
+/* Prototype : string htmlspecialchars ( string $string [, int $quote_style [, string $charset [, bool $double_encode ]]] )
+ * Description: Convert special characters to HTML entities
+ * Source code: ext/standard/string.c
+*/
+
+echo "*** Testing htmlspecialchars() : basic functionality ***\n";
+
+$s1 = "abc<>\"&\n";
+$s2 = "&&abc<>\"&\n";
+$s3 = "a>,\<bc<>\"&\n";
+$s4 = "a\'\'&bc<>\"&\n";
+$s5 = "&<\n";
+echo "Basic tests\n";
+echo "Test 1: " . htmlspecialchars ($s1);
+echo "Test 2: " . htmlspecialchars ($s2);
+echo "Test 3: " . htmlspecialchars ($s3);
+echo "Test 4: " . htmlspecialchars ($s4);
+echo "Test 5: " . htmlspecialchars ($s5);
+echo "Test 6: " . htmlspecialchars ($s1,ENT_NOQUOTES);
+echo "Test 7: " . htmlspecialchars ($s2,ENT_NOQUOTES);
+echo "Test 8: " . htmlspecialchars ($s3,ENT_NOQUOTES);
+echo "Test 9: " . htmlspecialchars ($s4,ENT_NOQUOTES);
+echo "Test 10: " . htmlspecialchars ($s5,ENT_NOQUOTES);
+echo "Test 11: " . htmlspecialchars ($s1,ENT_COMPAT);
+echo "Test 12: " . htmlspecialchars ($s2,ENT_COMPAT);
+echo "Test 13: " . htmlspecialchars ($s3,ENT_COMPAT);
+echo "Test 14: " . htmlspecialchars ($s4,ENT_COMPAT);
+echo "Test 15: " . htmlspecialchars ($s5,ENT_COMPAT);
+echo "Test 16: " . htmlspecialchars ($s1,ENT_QUOTES);
+echo "Test 17: " . htmlspecialchars ($s2,ENT_QUOTES);
+echo "Test 18: " . htmlspecialchars ($s3,ENT_QUOTES);
+echo "Test 19: " . htmlspecialchars ($s4,ENT_QUOTES);
+echo "Test 20: " . htmlspecialchars ($s5,ENT_QUOTES);
+
+echo "\nTry with char set option - specify default ISO-8859-1\n";
+echo "Test 21: " . htmlspecialchars ($s1,ENT_NOQUOTES, "ISO-8859-1");
+echo "Test 22: " . htmlspecialchars ($s2,ENT_COMPAT, "ISO-8859-1");
+echo "Test 23: " . htmlspecialchars ($s3,ENT_QUOTES, "ISO-8859-1");
+echo "Test 24: " . htmlspecialchars ($s5,ENT_QUOTES, "ISO-8859-1");
+
+echo "\nTry with double decode FALSE\n";
+$s1 = ""&xyz>abc"\n";
+$s2 = ""&123<456"\n";
+$s3 = "\"300 < 400\"\n";
+echo "Test 25: " . htmlspecialchars ($s1,ENT_NOQUOTES, "ISO-8859-1", false);
+echo "Test 26: " . htmlspecialchars ($s2,ENT_NOQUOTES, "ISO-8859-1", false);
+echo "Test 27: " . htmlspecialchars ($s3,ENT_NOQUOTES, "ISO-8859-1", false);
+
+echo "\nTry with double decode TRUE\n";
+echo "Test 28: " . htmlspecialchars ($s1, ENT_NOQUOTES, "ISO-8859-1", true);
+echo "Test 29: " . htmlspecialchars ($s2, ENT_NOQUOTES, "ISO-8859-1", true);
+
+?>
+===DONE===
+--EXPECT--
+*** Testing htmlspecialchars() : basic functionality ***
+Basic tests
+Test 1: abc<>"&
+Test 2: &&abc<>"&
+Test 3: a>,\<bc<>"&
+Test 4: a\'\'&bc<>"&
+Test 5: &amp;&lt;
+Test 6: abc<>"&
+Test 7: &&abc<>"&
+Test 8: a>,\<bc<>"&
+Test 9: a\'\'&bc<>"&
+Test 10: &amp;&lt;
+Test 11: abc<>"&
+Test 12: &&abc<>"&
+Test 13: a>,\<bc<>"&
+Test 14: a\'\'&bc<>"&
+Test 15: &amp;&lt;
+Test 16: abc<>"&
+Test 17: &&abc<>"&
+Test 18: a>,\<bc<>"&
+Test 19: a\'\'&bc<>"&
+Test 20: &amp;&lt;
+
+Try with char set option - specify default ISO-8859-1
+Test 21: abc<>"&
+Test 22: &&abc<>"&
+Test 23: a>,\<bc<>"&
+Test 24: &amp;&lt;
+
+Try with double decode FALSE
+Test 25: "&xyz>abc"
+Test 26: "&123<456"
+Test 27: "300 < 400"
+
+Try with double decode TRUE
+Test 28: &quot;&amp;xyz&gt;abc&quot;
+Test 29: &quot;&amp;123&lt;456&quot;
+===DONE===
\ No newline at end of file