How to insert a String delimited by special chars into table - php

Question

I'd like to do INSERT to a table. This table is a simple table.
student_id subject_id student_name student_report
S001 M01 Albert A+
S001 M02 Albert A
S002 M04 Shana B+
I have a datasource from a single string delimited by special chars. Something like this.
S003###M02###Meru###C###S003###M03###Meru###S004###M01###Haschel###D
How do I insert that kind of string to the table?
Any answers or clue or reference greatly appreciated. Thank you in advance
The table looks like after insert:
student_id subject_id student_name student_report
S001 M01 Albert A+
S001 M02 Albert A
S002 M04 Shana B+
S003 M02 Meru C
S003 M02 Meru NULL //no data here
S004 M01 Haschel D

Answer 1

You need to split this string. Use explode function like this:
$data = explode('###',$stingValue,);
$data will be having all the values. Open database connection, bind write a query, bind parameters and execute it.

Answer 2

you can it do with a query like this:
SELECT
REVERSE(SUBSTRING_INDEX(REVERSE(
SUBSTRING_INDEX('S003###M02###Meru###C###S003###M03###Meru###S004###M01###Haschel###D','###',3)),'###',1));
To INSERT
INSERT INTO YOUR_TABLE
SET
student_id = REVERSE(SUBSTRING_INDEX(REVERSE(
SUBSTRING_INDEX('S003###M02###Meru###C###S003###M03###Meru###S004###M01###Haschel###D','###',1)),'###',1)),
subject_id = REVERSE(SUBSTRING_INDEX(REVERSE(
SUBSTRING_INDEX('S003###M02###Meru###C###S003###M03###Meru###S004###M01###Haschel###D','###',2)),'###',1));
sample
mysql> SELECT REVERSE(SUBSTRING_INDEX(REVERSE( SUBSTRING_INDEX('S003###M02###Meru###C###S003###M03###Meru###S004###M01###Haschel###D','###',1)),'###',1)) as reselt;
+--------+
| reselt |
+--------+
| S003 |
+--------+
1 row in set (0,00 sec)
mysql> SELECT REVERSE(SUBSTRING_INDEX(REVERSE( SUBSTRING_INDEX('S003###M02###Meru###C###S003###M03###Meru###S004###M01###Haschel###D','###',2)),'###',1)) as reselt;
+--------+
| reselt |
+--------+
| M02 |
+--------+
1 row in set (0,00 sec)
mysql> SELECT REVERSE(SUBSTRING_INDEX(REVERSE( SUBSTRING_INDEX('S003###M02###Meru###C###S003###M03###Meru###S004###M01###Haschel###D','###',3)),'###',1)) as reselt;
+--------+
| reselt |
+--------+
| Meru |
+--------+
1 row in set (0,00 sec)

Answer 3

if your String contains value for multiple rows, you should add a line end parameter to signify the starting of new row's values instead of delimeters.
e.g. :
Use S003###M02###Meru###C$$$S003###M03###Meru$$$S004###M01###Haschel###D
instead of S003###M02###Meru###C###S003###M03###Meru###S004###M01###Haschel###D
if any field is empty there there should be delimeters twice without any value between them.
e.g.
Use S003###M03###Meru######
Instead of Use S003###M03###Meru###
Add a end of text delimeter to signify no more records are there. such as ##
Now it will be easy for you, loop each line to get the string that has values for each row of database and stop processing when you have reached end of text:
The logic for the parser somewhat goes like this (not php just pseudocode):
while(character != <end-of-line-character>)
{
if( character != <new-line-character> )
{
string = string . character
}
else
{
value_to_insert_in_database = explode("###", string)
perform_insertion_in_database with value_to_insert_in_database
string = ""
}
}
Thanks and regards