Added tldr pages for php

common/php.md

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+# php
+
+> PHP Command Line Interface 'CLI'
+
+- Parse and execute a file
+
+`php {{file}}`
+
+- Run PHP interactively
+
+`php -a`
+
+- Run PHP code. Notes: a) Don't use <? ?> tags; b) Escape double quotes with backslash
+
+`php -r "{{code}}"`