replace php short tags (<?) with long one (<?php)

replace_php_short_tags.sh

#!/bin/bash
 
# purpose of these lines are to change short PHP tags to the full "<?php" style tag version
# PHP version 7+ has deprecated short tags
 
# first short PHP tags with something that is not a letter after
find . -iname "*.php" -print0 | xargs -0 -I{} sed -i -r 's/(<\?)([^a-zA-Z])/\1php\2/g' '{}'
 
# then find short PHP tags at end of line
find . -iname "*.php" -print0 | xargs -0 -I{} sed -i -r 's/<\?$/<\?php/g' '{}'

# IMPORTANT: On OSX you should add the -E flag to sed so extended regular expression is used.

With
find . -iname "*.php" -print0 | xargs -0 -I{} sed -i -r 's/(<\?)([^a-zA-Z=]|$)/\1php\2/g' '{}'
you replace also the <?\n

This code replace <?=LANGUAGE_ID;?> to <?php=LANGUAGE_ID;?>