Merge pull request #58 from breakliu/bugfix/compatibility-is_countable

compatibility: is_countable (PHP 7 >= 7.3.0, PHP 8)

Author: tiamo

src/Sav/Record/Info/LongStringMissingValues.php

@@ -4,6 +4,7 @@
 
 use SPSS\Buffer;
 use SPSS\Sav\Record\Info;
+use SPSS\Utils;
 
 class LongStringMissingValues extends Info
 {
@@ -32,7 +33,7 @@ public function write(Buffer $buffer)
             foreach ($this->data as $varName => $values) {
                 $localBuffer->writeInt(mb_strlen($varName));
                 $localBuffer->writeString($varName);
-                $localBuffer->write(\chr(\is_countable($values) ? \count($values) : 0), 1);
+                $localBuffer->write(\chr(Utils::is_countable($values) ? \count($values) : 0), 1);
                 $localBuffer->writeInt(8);
                 foreach ($values as $value) {
                     $localBuffer->writeString($value, 8);

src/Sav/Record/Info/LongStringValueLabels.php

@@ -4,6 +4,7 @@
 
 use SPSS\Buffer;
 use SPSS\Sav\Record\Info;
+use SPSS\Utils;
 
 class LongStringValueLabels extends Info
 {
@@ -47,7 +48,7 @@ public function write(Buffer $buffer)
             $localBuffer->writeInt(mb_strlen($varName));
             $localBuffer->writeString($varName);
             $localBuffer->writeInt($width);
-            $localBuffer->writeInt(\is_countable($data['values']) ? \count($data['values']) : 0);
+            $localBuffer->writeInt(Utils::is_countable($data['values']) ? \count($data['values']) : 0);
             foreach ($data['values'] as $value => $label) {
                 $localBuffer->writeInt($width);
                 $localBuffer->writeString($value, $width);

src/Utils.php

@@ -257,4 +257,17 @@ public static function segmentAllocBytes($width, $segment)
 
         return 0 === $width ? 8 : self::roundUp(self::segmentAllocWidth($width, $segment), 8);
     }
+
+    /**
+     * @param mixed $values
+     */
+    public static function is_countable($values)
+    {
+        # is_countable (PHP 7 >= 7.3.0, PHP 8)
+        if (version_compare(PHP_VERSION, "7.3") < 0) {
+            return (is_array($values) || is_object($values) || is_iterable($values) || $values instanceof Countable);
+        } else {
+            return \is_countable($values);
+        }
+    }
 }