Operator Precedence is an important point of knowledge that a programmer must understand and hold, let's take a look at the PHP operator precedence article.
Today in Lao Wang's technical manual saw a problem:
The code is as follows
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The operator precedence specifies how tightly the two expressions are bound. For example, the result of an expression 1 + 5 * 3 is 16 instead of 18 because multiplication sign ("*") has a higher precedence than a plus sign ("+"). You can use
The two priorities are the same, and the comparison (comparision) and Assignment (Assignment) operations are slightly different. The comparison operator has a, =, and so on, the assignment operator has =, + =, *=, and so on.
The comparison
When we talked about the PHP logical operators, we mentioned the precedence of the PHP operators, the so-called operator precedence, which is the calculation of which operation Mr. Foo in the expression, which is calculated as if the result of the
The operator precedence specifies how tightly the two expressions are bound. For example, the result of the expression 1 + 5 * 3 is that it is because multiplication sign ("*") has a higher priority than the plus sign ("+"). You can use
The operator precedence specifies how tightly the two expressions are bound. For example, the result of an expression 1 + 5 * 3 is 16 instead of 18 because multiplication sign ("*") has a higher precedence than a plus sign ("+"). You can use
Today in Lao Wang's technical handbook see a problem:
The code is as follows
Copy Code
What is the output?
This question may seem simple at first glance, but it is not easy to scrutinize it,
If the Boolean
When learning PHP, you may encounter the precedence of the PHP operator, here will explain the PHP operator priority problem resolution, here to share with you. PHP supports an error control operator: @. Any error messages that may be generated by
The operator precedence specifies how tightly the two expressions are bound. For example, the result of the expression 1 + 5 * 3 is that It is because multiplication sign ("*") has a higher priority than the plus sign ("+"). You can use
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