Fix: PHP file not executing on server error - Quick Solutions

The ‘PHP file not executing on server’ error occurs when PHP files are not processed by the server and are displayed as plain text or download instead of being executed.

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Common Causes and Fixes

1. Wrong File Extension

<?php
// ❌ Error: Wrong file extension
// File saved as: script.txt instead of script.php
echo "Hello World";
?>

<?php
// ✅ Fixed: Correct file extension
// File saved as: script.php
echo "Hello World";
?>

2. Server Not Configured for PHP

<!-- ❌ Error: Server serves as plain text -->
<?php
echo "This should be executed";
?>

<?php
// ✅ Fixed: Server configured for PHP
echo "This will be executed";
?>

3. PHP Tags Missing

<!-- ❌ Error: No PHP tags -->
Hello World

<?php
// ✅ Fixed: PHP tags included
echo "Hello World";
?>

4. Short Tags Disabled

<?
// ❌ Error: Short tags disabled
echo "Hello World";
?>

<?php
// ✅ Fixed: Full PHP tags
echo "Hello World";
?>

5. File Permissions

# ❌ Error: Wrong permissions
-rw------- script.php  # Only owner can read

# ✅ Fixed: Correct permissions
-rwxr-xr-x script.php  # Owner: rwx, Group: rx, Others: rx
# OR
-rw-r--r-- script.php  # 644 permissions

6. Web Server Configuration

# ❌ Error: Apache not configured for PHP
<FilesMatch "\.php$">
    # PHP handler not configured
</FilesMatch>

# ✅ Fixed: Apache configured for PHP
<FilesMatch "\.php$">
    SetHandler application/x-httpd-php
</FilesMatch>

7. PHP Module Not Loaded

# ❌ Error: PHP module not loaded
apache2ctl -M | grep php  # No PHP modules

# ✅ Fixed: Load PHP module
# In Apache: LoadModule php_module modules/libphp.so
# In Nginx: fastcgi_pass 127.0.0.1:9000;

8. MIME Type Issues

# ❌ Error: Wrong MIME type
AddType text/plain .php

# ✅ Fixed: Correct MIME type
AddType application/x-httpd-php .php

9. Virtual Host Configuration

# ❌ Error: PHP not enabled in virtual host
<VirtualHost *:80>
    DocumentRoot /var/www/html
    # PHP not configured
</VirtualHost>

# ✅ Fixed: PHP enabled in virtual host
<VirtualHost *:80>
    DocumentRoot /var/www/html
    <Directory /var/www/html>
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

10. PHP Configuration

; ❌ Error: PHP execution disabled
engine = Off

; ✅ Fixed: PHP execution enabled
engine = On

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Quick Debugging Steps

1. Check file extension is .php
2. Verify PHP is installed on server
3. Test PHP info with <?php phpinfo(); ?>
4. Check server error logs
5. Verify file permissions
6. Confirm web server configuration
7. Test with simple PHP code

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Prevention Tips

• Always use .php extension
• Verify server supports PHP
• Check file permissions (644 for files)
• Ensure PHP module is loaded
• Configure web server for PHP
• Test with simple PHP script first
• Check server configuration files
• Monitor server error logs

Remember: PHP files must be processed by the server, not served as plain text.