Added support for php, composer, and php utilities

scripts/system/install_composer.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+   
+echo "Installing composer..."
+    
+EXPECTED_CHECKSUM="$(php -r 'copy("https://composer.github.io/installer.sig", "php://stdout");')"
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+ACTUAL_CHECKSUM="$(php -r "echo hash_file('sha384', 'composer-setup.php');")"
+
+if [ "$EXPECTED_CHECKSUM" != "$ACTUAL_CHECKSUM" ]
+then
+    >&2 echo 'ERROR: Invalid installer checksum'
+    rm composer-setup.php
+    exit 1
+fi
+
+php composer-setup.php --quiet
+RESULT=$?
+rm composer-setup.php
+
+sudo mv composer.phar /usr/local/bin/composer
+
+if [ $RESULT -eq 0 ]; then
+
+    echo '{"error": 0, "status": 0, "progress": 100, "no_progress":0, "message": "Composer installed sucessfully..."}'
+
+else
+    echo '{"error": 1, "status": 1, "progress": 100, "no_progress":0, "message": "Error: cannot install composer!"}'
+        
+    exit 1
+
+fi