Using loops to create arrays
我非常新的PHP,我想知道如果有人可以帮我使用一个for或while循环来创建一个数组10个元素的长度
$array = array();
$array2 = array();
// for example
for ($i = 0; $i < 10; ++$i) {
$array[] = 'new element';
}
// while example
while (count($array2) < 10 ) {
$array2[] = 'new element';
}
print "For: ".count($array)."<br />";
print "While: ".count($array2)."<br />";
A different approach to the for
loop would be...
$array = array();
foreach(range(0, 9) as $i) {
$array[] = 'new element';
}
print_r($array); // to see the contents
I use this method, I find it's easier to glance over to see what it does.
As strager pointed out, it may or may not be easier to read to you. He/she also points out that a temporary array is created, and thus is slightly more expensive than a normal for loop. This overhead is minimal, so I don't mind doing it this way. What you implement is up to you.
更容易理解一个初学者也许...
<?php
// for loop
for ($i = 0; $i < 10; $i++) {
$myArray[$i] = "This is element ".$i." in the array";
echo $myArray[$i];
}
//while loop
$x = 0;
while ($x < 10) {
$someArray[$x] = "This is element ".$x." in the array";
echo $someArray[$x];
$x++;
}
?>
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