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<?php
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//等于==和全等于===
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$a=10;
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$b='10';
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if($a==$b){
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echo 'a的值等于b的值'.'<br>';
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}
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$c=10;
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$d=10;
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if($c===$d)
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{
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echo 'c的类型和值等于d的类型和值'.'<br>';
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}
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?>
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