为什么1234 =='1234 test'评估为true? [英] Why does 1234 == '1234 test' evaluate to true?

问题描述

可能重复:
php == vs ===运算符

Possible Duplicate:
php == vs === operator

对于我确定的人来说，这是一个简单的答案.有人可以解释为什么此表达式的值为真吗?

An easy answer for someone I'm sure. Can someone explain why this expression evaluates to true?

(1234 == '1234 test')

推荐答案

因为您使用的是==(相似性)运算符，而PHP会将字符串强制为整数.

Because you are using the == (similarity) operator and PHP is coercing the string to an int.

要使用===(等于)运算符来解决该问题，该运算符不仅检查值是否相同，还检查数据类型是否相同，因此将不考虑"123"字符串和123 int相等.

To resolve it use the === (equality) operator, which checks not only if the value is the same, but also if the data type is the same, so "123" string and 123 int won't be considered equal.

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