Let me backup to some simple ways to output values.
The logs will fill up pretty quickly in “debug mode,” so you only want to turn it on temporarily. When the program is run in debug mode or the log level is set to debug, these messages will end up in your stdout, stderr, or log files. In PHP, you can use various loggers to log debug messages. It’s useful to have debug logging in your program. Sometimes this means doing a var_dump or logging a whole series of events. When you need a simple way to debug programs and you have no other options, you can usually output values. Let’s start with a basic technique in PHP debugging: outputting and logging values. I’ll get into the specifics that apply to PHP, from the basics all the way to fully integrated debugging techniques. In this detailed guide to PHP debugging, you’ll see some debugging techniques that apply to almost any programming language. If you use PHP or you find yourself “adopting” a PHP app (like I did a few years ago), you must know how to debug PHP.
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