12道PHP类型检测题目
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$a .= "a";
$a .= "b";
$a .= "c";
What is the value of $a ?
$a = 4;
for ($b = 0; $b <= $a; $b++) {
$c++;
}
What is the value of $c ?
$a[] = "a";
$a[] = "b";
$a[] = "c";
What is the value of $a ?
$a = 200.5;
$b = 2005;
$c = "2005";
Which of the above variables's type is integrer ?
$
$a = '1';
$b = &$a;
$b = "2$a";
What is the value of $a ?
$a = "abc";
$b = substr($a, 0, -1);
What is the value of $b ?
$a = true;
$b = "true";
$c[] = "true";
Which of the above variables's type is string ?
$
$a = "b";
$b = "a";
What is the value of ${$b} ?
$a = array("a","b","c");
foreach ($a as $b){
$c++;
}
What is the value of $c ?
$a = "0";
$b = "0";
if ($a != "1" && $b == "1" || $a != "0" || $b != "1" ){
$d = "0";
}else{
$d = "1";
}
What is the value of $d ?
$a = "post_processed_string";
$b = array("post_", "_");
$c = array("", " ");
$d = ucwords(str_replace($b,$c,$a));
What is the value of $d ?
$a = "<tt>some</tt><b>html</b>";
preg_match("/<\w?>(\w*?)<\/\w?>/",$a,$b);
What is the value of $b ?
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