adding array_flip to deprecated

Author: jaydiablo

composer.json

@@ -12,6 +12,7 @@
         },
         "files": [
             "deprecated/apc.php",
+            "deprecated/arrays.php",
             "deprecated/libevent.php",
             "deprecated/mssql.php",
             "deprecated/stats.php",

deprecated/arrays.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Safe;
+
+use Safe\Exceptions\ArrayException;
+
+/**
+ * array_flip returns an array in flip
+ * order, i.e. keys from array become values and values
+ * from array become keys.
+ *
+ * Note that the values of array need to be valid
+ * keys, i.e. they need to be either integer or
+ * string. A warning will be emitted if a value has the wrong
+ * type, and the key/value pair in question will not be included
+ * in the result.
+ *
+ * If a value has several occurrences, the latest key will be
+ * used as its value, and all others will be lost.
+ *
+ * @param array $array An array of key/value pairs to be flipped.
+ * @return array Returns the flipped array on success.
+ * @throws ArrayException
+ *
+ */
+function array_flip(array $array): array
+{
+    return \array_flip($array);
+}

deprecated/functionsList.php

@@ -11,6 +11,7 @@
     'apc_inc',
     'apc_load_constants',
     'apc_sma_info',
+    'array_flip',
     'event_add',
     'event_base_loopbreak',
     'event_base_loopexit',

deprecated/strings.php

@@ -298,11 +298,10 @@
 function sprintf(string $format, ...$params): string
 {
     if ($params !== []) {
-        $result = \sprintf($format, ...$params);
+        return \sprintf($format, ...$params);
     } else {
-        $result = \sprintf($format);
+        return \sprintf($format);
     }
-    return $result;
 }
 
 /**
@@ -358,9 +357,8 @@ function sprintf(string $format, ...$params): string
 function substr(string $string, int $start, int $length = null): string
 {
     if ($length !== null) {
-        $result = \substr($string, $start, $length);
+        return \substr($string, $start, $length);
     } else {
-        $result = \substr($string, $start);
+        return \substr($string, $start);
     }
-    return $result;
 }