Script to compare functions

compare_functions.sh

#!/bin/bash

function is_installed() {
  hash $1 2>/dev/null
}

for app in cat grep sed diff; do
  if ! is_installed $app; then
    echo "Please install $app"
    exit -1
  fi
done

if [ ${#} -lt 2 ]; then
  echo "Use: $0 fileA.php fileB.php"
  exit -1
fi

f=function
p="s/.*$f\ \([a-zA-Z0-9_]*\).*/\1/"

diff --suppress-common-lines -y \
  <(cat "$1"|grep $f|sed -e "$p") \
  <(cat "$2"|grep $f|sed -e "$p")

.