如何从WordPress数据库的BLOB列中检索数值数据

Question

I have gone through to many discussions on BLOB but most of them are related to retrieving images from BLOB column but my requirement is to retrieve single data out of several binaries stored in the BLOB column.

<?php $blobdata = $wpdb->get_results( "SELECT * FROM slips WHERE status = 'awaiting' " );

       foreach ( $blobdata as $bd ){
           $view = $bd->bet_options_ids; echo $view; 
        }
         endforeach;
        ?>

The above code prints as: a:1:{i:5;s:4:"1.45";}

Here I want to store the value of i:5 (i = 5) in variable say $store_i = $bd->bet_options_ids;

I have no idea how can I get that individual data to store in variable or even just print out individually.

Anyone's suggestions will be really helpful.

Answer 1

$blobdata = $wpdb->get_results( "SELECT * FROM slips WHERE status = 'awaiting' " );

foreach ( $blobdata as $bd ){
 $view = $bd->bet_options_ids; //getting serialize data 
 $view = unserialize($view); // doing unserialize
 if(array_key_exists(5,$view)){ //checking array key is 5 or not
    $value = 5; //taking the value of 5 key element
  }
 }
echo $value