Module development and code questions

Trying to find a simple way to add via hook possibly within mymodulename_search_api_solr_search_results_alter to hide a specific site page from internal search results. I'm finding suggestions for modules but is there a simpler way to hide a page?

How to save a text file in database by taking input through form?

Scenario

Site building:

• Taxonomy: Vocabulary 'Countries' (around 300 terms, one for each country).
• Content type Office: with a taxonomy reference field to Countries, so you can tag an office with a country.
• View: showing Offices with an exposed filter on Countries taxonomy.

Front:

• In the view's page, you filter by 100 countries to get the Offices in that countries.

Result:

Hi,

I have to merge contents from few nodes and write them in a file. I have to then download the file as pdf. Everything needs to be done programmatically. 

I have searched for examples to help me with it, but have not found any helpful ones.

Could you please let me know how to write the contents in a file and then let a user to download the file as pdf?

Thanks,

Hi,

I have to merge contents from few nodes and write them in a file. I have to then download the file as pdf. Everything needs to be done programmatically. 

I have searched for examples to help me with it, but have not found any helpful ones.

Could you please let me know how to write the contents in a file and then let a user to download the file as pdf?

Thanks,

I have a website in core php with 'users' table that contains simple md5 encrypted password. I want to migrate those password and convert them into drupal hash password.
For e.g. md5 pass: 89fc9bf09b4025ce28c67cb33146d61a
and after migration password will be stored like this: $S$EIMxgxYxwUxrj.uWOr9c4WSQiCvOzASdJUBhVfg8Fsa8zHitUUtq

I tried below code in .yml but thats not convert the encrypted password to drupal hash