add PasswordCompat\binary\check() in the library

2 files changed, 22 insertions, 5 deletions

diff --git a/lib/password.php b/lib/password.php
index e8ec028..e69bc17 100644
--- a/lib/password.php
+++ b/lib/password.php
@@ -274,6 +274,25 @@ namespace PasswordCompat\binary {
            return mb_substr($binary_string, $start, $length, '8bit');
        }
        return substr($binary_string, $start, $length);
-   }
+    }
+
+    /**
+     * Check if current PHP version is compatible with the library
+     *
+     * @return boolean the check result
+     */
+    function check() {
+        static $pass = NULL;
 
+        if (is_null($pass)) {
+            if (function_exists('crypt')) {
+                $hash = '$2y$04$usesomesillystringfore7hnbRJHxXVLeakoG8K30oukPsA.ztMG';
+                $test = crypt("password", $hash);
+                $pass = $test == $hash;
+            } else {
+                $pass = false;
+            }
+        }
+        return $pass;
+    }
 }
diff --git a/version-test.php b/version-test.php
index f527e30..96f60ca 100644
--- a/version-test.php
+++ b/version-test.php
@@ -1,8 +1,6 @@
 <?php
 
-$hash = '$2y$04$usesomesillystringfore7hnbRJHxXVLeakoG8K30oukPsA.ztMG';
-$test = crypt("password", $hash);
-$pass = $test == $hash;
+require "lib/password.php";
 
-echo "Test for functionality of compat library: " . ($pass ? "Pass" : "Fail");
+echo "Test for functionality of compat library: " . (PasswordCompat\binary\check() ? "Pass" : "Fail");
 echo "\n";
\ No newline at end of file