Add support for checking PHP code, courtesy of Spencer Wood.

README.md

@@ -34,6 +34,7 @@ name. That seems to be the fairest way to arrange this table.
 | Haskell | [ghc](https://www.haskell.org/ghc/)^ |
 | JavaScript | [eslint](http://eslint.org/), [jscs](http://jscs.info/), [jshint](http://jshint.com/) |
 | JSON | [jsonlint](http://zaa.ch/jsonlint/) |
+| PHP | [php -l](https://secure.php.net/) |
 | Python | [flake8](http://flake8.pycqa.org/en/latest/) |
 | Ruby   | [rubocop](https://github.com/bbatsov/rubocop) |
 | SASS/SCSS | [sass-lint](https://www.npmjs.com/package/sass-lint) |

ale_linters/php/php.vim

@@ -0,0 +1,45 @@
+" Author: Spencer Wood <https://github.com/scwood>
+" Description: This file adds support for checking PHP with php-cli
+
+if exists('g:loaded_ale_linters_php_php')
+    finish
+endif
+
+let g:loaded_ale_linters_php_php = 1
+
+function! ale_linters#php#php#Handle(buffer, lines)
+    " Matches patterns like the following:
+    "
+    " Parse error: parse error in - on line 7
+    let pattern = 'Parse error: \(.\+\) on line \(\d\+\)'
+    let output = []
+
+    for line in a:lines
+        let l:match = matchlist(line, pattern)
+
+        if len(l:match) == 0
+            continue
+        endif
+
+        " vcol is needed to indicate that the column is a character.
+        call add(output, {
+        \   'bufnr': a:buffer,
+        \   'lnum': l:match[2] + 0,
+        \   'vcol': 0,
+        \   'col': 1,
+        \   'text': l:match[1],
+        \   'type': 'E',
+        \   'nr': -1,
+        \})
+    endfor
+
+    return output
+endfunction
+
+call ALEAddLinter('php', {
+\   'name': 'php',
+\   'executable': 'php',
+\   'output_stream': 'stderr',
+\   'command': 'php -l --',
+\   'callback': 'ale_linters#php#php#Handle',
+\})