((comment) @injection.content
  (#set! injection.language "phpdoc"))

(heredoc
  (heredoc_body) @injection.content
  (heredoc_end) @injection.language
  (#set! injection.include-children))

(nowdoc
  (nowdoc_body) @injection.content
  (heredoc_end) @injection.language
  (#set! injection.include-children))

; regex
((function_call_expression
  function: (_) @_preg_func_identifier
  arguments: (arguments
    .
    (argument
      (_
        (string_content) @injection.content))))
  (#set! injection.language "regex")
  (#lua-match? @_preg_func_identifier "^preg_"))

; bash
((function_call_expression
  function: (_) @_shell_func_identifier
  arguments: (arguments
    .
    (argument
      (_
        (string_content) @injection.content))))
  (#set! injection.language "bash")
  (#any-of? @_shell_func_identifier
    "shell_exec" "escapeshellarg" "escapeshellcmd" "exec" "passthru" "proc_open" "shell_exec"
    "system"))

(expression_statement
  (shell_command_expression
    (string_content) @injection.content)
  (#set! injection.language "bash"))