(PECL pht >= 0.0.1)
pht\Vector::unshift — Unshifts a value to the vector front
This method unshifts a value to the front of a vector (in linear time). The vector will automatically be resized if it is not large enough.
valueThe value to be pushed onto the beginning of the vector. This value will be serialised (since it may be passed around between threads).
No return value.
Example #1 Unshifting a value to the front of a vector
<?php
use pht\Vector;
$vector = new Vector();
for ($i = 0; $i < 3; ++$i) {
$vector->unshift($i); // causes a quadratic runtime, beware
}
var_dump($vector);
以上例程会输出：
object(pht\Vector)#1 (3) {
[0]=>
int(2)
[1]=>
int(1)
[2]=>
int(0)
}