Enforce indentation consistency in php files

examples/put.php

@@ -6,9 +6,9 @@ use \Curl\Curl;
 // curl -X PUT -d "id=1&first_name=Zach&last_name=Borboa" "http://httpbin.org/put"
 $curl = new Curl();
 $curl->put('http://httpbin.org/put', array(
-  'id' => 1,
-  'first_name' => 'Zach',
-  'last_name' => 'Borboa',
+    'id' => 1,
+    'first_name' => 'Zach',
+    'last_name' => 'Borboa',
 ));
 
 echo 'Data server received via PUT:' . "\n";

tests/script.sh

@@ -18,6 +18,38 @@ if [[ ! -z "${tab_char}" ]]; then
     exit 1
 fi
 
+# Enforce indentation consistency in php files.
+find_invalid_indentation() {
+    filename="${1}"
+    script=$(cat <<'EOF'
+    $filename = $argv['1'];
+    $lines = explode("\n", file_get_contents($filename));
+    $line_number = 0;
+    foreach ($lines as $line) {
+        $line_number += 1;
+        $leading_space_count = strspn($line, ' ');
+        $remainder = $leading_space_count % 4;
+        if (!($remainder === 0)) {
+            // Allow doc comments.
+            if (substr(ltrim($line), 0, 1) === '*') {
+                continue;
+            }
+            $add_count = 4 - $remainder;
+            $remove_count = $remainder;
+            echo 'Invalid indentation found in ' . $filename . ':' . $line_number .
+                ' (' . $leading_space_count . ':+' . $add_count . '/-' . $remove_count . ')' . "\n";
+        }
+    }
+EOF)
+    php --run "${script}" "${filename}"
+}
+export -f "find_invalid_indentation"
+invalid_indentation=$(find . -type "f" -iname "*.php" -exec bash -c 'find_invalid_indentation "{}"' \;)
+if [[ ! -z "${invalid_indentation}" ]]; then
+    echo "${invalid_indentation}"
+    exit 1
+fi
+
 # Prohibit trailing whitespace in php files.
 trailing_whitespace=$(find . -type "f" -iname "*.php" -exec egrep --line-number -H " +$" {} \;)
 if [[ ! -z "${trailing_whitespace}" ]]; then