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everything is beautiful php intval test code found problems

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Release： 2016-07-29 08:38:29
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$o = 0.1;
for($a = 1; $a < 100; $a++){
    $o += 0.1;
    echo "intval('$o') = ".intval($o);
    if(intval($o)){
        print(" true");
    }else{
        print(" false");
    }
}
?> 
结果:
intval('0.2') = 0 false
intval('0.3') = 0 false
intval('0.4') = 0 false
intval('0.5') = 0 false
intval('0.6') = 0 false
intval('0.7') = 0 false
intval('0.8') = 0 false
intval('0.9') = 0 false
intval('1') = 0 false
intval('1.1') = 1 true
intval('1.2') = 1 true
intval('1.3') = 1 true
intval('1.4') = 1 true
intval('1.5') = 1 true
intval('1.6') = 1 true
intval('1.7') = 1 true
intval('1.8') = 1 true
intval('1.9') = 1 true
intval('2') = 2 true
intval('2.1') = 2 true
intval('2.2') = 2 true
intval('2.3') = 2 true
intval('2.4') = 2 true
intval('2.5') = 2 true
intval('2.6') = 2 true
intval('2.7') = 2 true
intval('2.8') = 2 true
..... 
发现 intval(1) 竟然返回 0 
不测试不会知道的
假象:
print("intval("1.0") = ".intval("1.0"));
print("intval('1.0') = ".intval('1.0'));
print("intval('1') = ".intval('1')); 
intval("1.0") = 1
intval('1.0') = 1
intval('1') = 1 

以上就介绍了everything is beautiful php intval的测试代码发现问题，包括了everything is beautiful方面的内容，希望对PHP教程有兴趣的朋友有所帮助。

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