Partially fix inserting new lines in the PHP version

src/Editor.php

@@ -127,9 +127,9 @@ class Editor {
 					}
 
 					// Update the syntax highlighting for all the rows of the file
-					for ($i = 0; $i < $this->numRows; $i++)
+					foreach ($this->rows as $row)
 					{
-						$this->rows[$i]->updateSyntax();
+						$row->updateSyntax();
 					}
 
 					return;
@@ -193,19 +193,17 @@ class Editor {
 		}
 		else
 		{
-			// Update other row indices
-			$numRows = $this->numRows;
-			$i = $at + 1;
-			for (; $i <= $numRows; $i++)
-			{
-				$this->rows[$i]->idx++;
-			}
-
 			$this->rows = [
 				...array_slice($this->rows, 0, $at),
 				$row,
 				...array_slice($this->rows, $at),
 			];
+
+			// Update row indicies
+			foreach ($this->rows as $i => $row)
+			{
+				$row->idx = $i;
+			}
 		}
 
 		// Re-tokenize the file
@@ -272,18 +270,29 @@ class Editor {
 	{
 		if ($this->cursorX === 0)
 		{
-			$this->insertRow($this->cursorY, '');
+			$this->insertRow($this->cursorY, '', FALSE);
 		}
 		else
 		{
 			$row = $this->rows[$this->cursorY];
+			$chars = $row->chars;
+			$newRowChars = substr($chars, $this->cursorX);
+			$row->chars = substr($chars, 0, $this->cursorX);
 
 			// Add a new row, with the contents from the cursor to the end of the line
-			$this->insertRow($this->cursorY + 1, substr($row->chars, $this->cursorX));
+			$this->insertRow($this->cursorY + 1, $newRowChars, FALSE);
 
 			// Update the (now previous) row
-			$row->chars = substr($row->chars, 0, $this->cursorX);
-			$row->update();
+			if ($this->syntax->filetype !== 'PHP')
+			{
+				$row->update();
+			}
+		}
+
+		// Re-tokenize the file
+		if ($this->syntax->filetype === 'PHP')
+		{
+			$this->refreshPHPSyntax();
 		}
 
 		$this->cursorY++;

src/functions.php

@@ -355,7 +355,10 @@ function get_php_tokens(string $code): array
 			// So the array of tokens isn't sparse
 			for ($i = $lineNum; $i < $currentLine; $i++)
 			{
-				$tokens[$i] = [];
+				if ( ! array_key_exists($i, $tokens))
+				{
+					$tokens[$i] = [];
+				}
 			}
 
 			$lineNum = $currentLine;