tidusvn05 · September 17, 2022 11:59 · Sep 17, 2022 · Sep 17, 2022
diff --git a/stringInvertCase.php b/stringInvertCase.php
@@ -4,7 +4,7 @@
  * Uppercase to lowercase and lowercase to uppercase(ASCII string only).
  *
  * @param  string $value
- * @return string
+:x * @return string
  */
 function invertCase($value)
 {

diff --git a/stringInvertCase.php b/stringInvertCase.php
@@ -0,0 +1,15 @@
+<?php
+
+/**
+ * Uppercase to lowercase and lowercase to uppercase(ASCII string only).
+ *
+ * @param  string $value
+ * @return string
+ */
+function invertCase($value)
+{
+    return strtolower($value) ^ strtoupper($value) ^ $value;
+}
+
+// echo invertCase("Invert My CASE");
+// => iNVERT mY case
diff --git a/stringIsEmpty.php b/stringIsEmpty.php
@@ -0,0 +1,22 @@
+<?php 
+
+/**
+ * Right trim string.
+ *
+ * @param  string $value
+ * @param  bool   $fullsize
+ * @return string
+ */
+// function rtrim($value, $fullsize = true)
+// {
+//     if ($fullsize) {
+//         $value = preg_replace('/[\s]+$/u', '', $value);
+//     }
+
+//     return $value;
+// }
+
+
+echo 'aaaa   ';
+echo rtrim('aaaa   ');
+echo rtrim('aaaa   ');
diff --git a/stringStudlyCase.php b/stringStudlyCase.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * Convert a value to studly caps case.
+ *
+ *
+ * @param  string  $value
+ * @return string StudlyCaseString
+ */
+function studlyCase($value)
+{
+    $words = explode(' ', str_replace(['-', '_'], ' ', $value));
+
+    $studlyWords = array_map(function ($word) {
+        return ucfirst($word);
+    }, $words);
+
+    return implode($studlyWords);
+}
+
+// echo studlyCase("studly Case string");
+// => StudlyCaseString