diff --git a/php/string-count-test.php b/php/string-count-test.php
new file mode 100644
index 0000000..839c165
--- /dev/null
+++ b/php/string-count-test.php
@@ -0,0 +1,43 @@
+<?php
+// Simple substring search benchmark
+// https://gist.github.com/anthonyaxenov/045dac59676826236319199df1597bb5
+
+$string = str_repeat('1', 100);
+$max = 5000;
+$results = [
+    'preg_match_all' => [
+        'total' => 0,
+        'avg' => 0
+    ],
+    'substr_count' => [
+        'total' => 0,
+        'avg' => 0
+    ],
+    'count_chars' => [
+        'total' => 0,
+        'avg' => 0
+    ],
+];
+
+for ($i = 0; $i < $max; ++$i) {
+    $start = microtime(true);
+    preg_match_all('/1/', $string);
+    $results['preg_match_all']['total'] += round((microtime(true) - $start), 8);
+}
+$results['preg_match_all']['avg'] = round($results['preg_match_all']['total'] / $max, 8);
+
+for ($i = 0; $i < $max; ++$i) {
+    $start = microtime(true);
+    substr_count($string, '1');
+    $results['substr_count']['total'] += round((microtime(true) - $start), 8);
+}
+$results['substr_count']['avg'] = round($results['substr_count']['total'] / $max, 8);
+
+for ($i = 0; $i < $max; ++$i) {
+    $start = microtime(true);
+    count_chars($string, 1);
+    $results['count_chars']['total'] += round((microtime(true) - $start), 8);
+}
+$results['count_chars']['avg'] = round($results['count_chars']['total'] / $max, 8);
+
+print_r($results);