PHP angled single quote vs stright single quote

php

Solution

Angled quotes (

, actually called backticks) are used to delimit identifiers, e.g. fields and table names. Straight quotes are used to delimit strings, e.g. `'Hello, world!'`. You can't mix the two.

Problem

I had a developer create some code for me and he has used angled single quotes throughout the SQL statements. I have never used these before and was hoping someone could explain the difference between angled and straight? If I replace all angled with straight quotes the queries dont work.

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