Example Analysis of expressions in PHP

This article will explain in detail the example analysis of expressions in PHP. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

Expression is an important concept in PHP, which can be understood as "anything that has value". In this tutorial, when it comes to the syntax of expressions, we use "expr" to represent expressions.

Here is an expression:

$x > $y

In the above example, when the value of $x is greater than $y, the expression value is TRUE, otherwise it is FALSE.

We often determine the logic of our next step by judging the value of an expression (including specific and Boolean values), as in the following example:

This example uses if logic judgment, which is determined by the expression $x > $y in parentheses, and if $x > $y is true (TRUE), then the word "y > x" is output. Of course, the actual situation will be much more complicated.

Expressions exist widely in our PHP programming.

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