Configure PHP error logging and display on failure

The PHP error logging has been enabled and configured to write to a specific location. In addition, several steps have been added to the GitHub action workflow to display the PHP error log, standard error output, and check for a core dump any time a failure occurs during the workflow execution.

.github/workflows/build.yml

@@ -28,6 +28,11 @@ jobs:
           ulimit -c unlimited
           echo '/tmp/core-%e.%p' | sudo tee /proc/sys/kernel/core_pattern
 
+      - name: Set PHP error logging
+        run: |
+          echo "error_log = /tmp/php_errors.log" | sudo tee -a /usr/local/etc/php/php.ini
+          echo "log_errors = On" | sudo tee -a /usr/local/etc/php/php.ini
+
       - name: Install build tools
         run: sudo apt-get update && sudo apt-get install -y autoconf automake libtool bison re2c
 
@@ -43,4 +48,23 @@ jobs:
       - name: Run demo
         run: |
           php -d extension=./modules/rayaop.so -i | grep rayaop
-          php -d extension=./modules/rayaop.so -d memory_limit=128M -d report_memleaks=1 rayaop.php
+          php -d extension=./modules/rayaop.so -d memory_limit=128M -d report_memleaks=1 -d zend.assertions=1 -d assert.exception=1 rayaop.php 2> php_stderr.log
+        continue-on-error: true
+
+      - name: Display PHP error log
+        run: cat /tmp/php_errors.log
+        if: failure()
+
+      - name: Display stderr output
+        run: cat php_stderr.log
+        if: failure()
+
+      - name: Check for core dump
+        run: |
+          if ls /tmp/core-* 1> /dev/null 2>&1; then
+            echo "Core dump found"
+            ls -l /tmp/core-*
+          else
+            echo "No core dump found"
+          fi
+        if: failure()