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Using Laravel for Advanced String Manipulation in PHP

Updating an Individual Record’s Values

Understand how to update values of individual records within fixed-width data by calculating byte offsets and using substrReplace. Learn to manipulate specific fields efficiently by determining record and field positions in consistent-width datasets or variable width fields.

We'll cover the following...

We use the substrReplace method to insert a decimal separator into a string of numbers. We can make further use of this method to actually update the value of an individual record. For example, we assume the following data string:

         1      1200         5         1         2      3232         1
2         3      1600        10         3         4     62200         4
4         5
...