1 files changed, 27 insertions, 0 deletions
diff --git a/includes/htmlform/HTMLIntField.php b/includes/htmlform/HTMLIntField.php
new file mode 100644
index 00000000..28876e2c
--- /dev/null
+++ b/includes/htmlform/HTMLIntField.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * A field that must contain a number
+ */
+class HTMLIntField extends HTMLFloatField {
+	function validate( $value, $alldata ) {
+		$p = parent::validate( $value, $alldata );
+
+		if ( $p !== true ) {
+			return $p;
+		}
+
+		# http://dev.w3.org/html5/spec/common-microsyntaxes.html#signed-integers
+		# with the addition that a leading '+' sign is ok. Note that leading zeros
+		# are fine, and will be left in the input, which is useful for things like
+		# phone numbers when you know that they are integers (the HTML5 type=tel
+		# input does not require its value to be numeric).  If you want a tidier
+		# value to, eg, save in the DB, clean it up with intval().
+		if ( !preg_match( '/^((\+|\-)?\d+)?$/', trim( $value ) )
+		) {
+			return $this->msg( 'htmlform-int-invalid' )->parseAsBlock();
+		}
+
+		return true;
+	}
+}