PHP Object-oriented practice

Practice content: randomly generate a string

Code:

<?php
Class randstring{

Private $length;
Private $type;
Private $one = Array (0,1,2,3,4,5,6,7,8,9);
Private $two = Array (0,1,2,3,4,5,6,7,8,9, ' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' g ', ' h ', ' I ', ' j ', ' K ', ' l ', ' m ', ' n ', ' o ', ' P ', ' Q ', ' R ', ' s ', ' t ', ' u ', ' V ', ' w ', ' x ', ' y ', ' z ');
Private $three = Array (' A ', ' B ', ' C ', ' d ', ' e ', ' f ', ' g ', ' h ', ' I ', ' j ', ' K ', ' l ', ' m ', ' n ', ' o ', ' P ', ' Q ', ' R ', ' s ', ' t ', ' u ', ' V ', ' W ', ' x ', ' y ', ' z ', 0,1,2,3,4,5,6,7,8,9, ' A ', ' B ', ' C ', ' D ', ' E ', ' F ', ' G ', ' H ', ' I ', ' J ', ' K ', ' L ', ' M ', ' N ', ' O ', ' P ', ' Q ', ' R ', ' S ', ' T ', ' U ', ' V ', ' W ', ' X ', ' Y ', ' Z ');
function __construct ($l, $t) {

$this->length = $l;
$this->type = $t;


}
Public Function getString () {

if ($this->type = = 1) {

$arr = Array_rand ($one, $this->length);
$string = Explode ("", $arr);
return $string;

}else if ($this->type = = 2) {

$arr 1 = array ();
$arr = Array_rand ($this->two, $this->length);
for ($i =0; $i <count ($arr); $i + +) {

Array_push ($arr 1, $this->two[$arr [$i]]);
}
echo Implode ("", $arr 1);



}else if ($this->type = = 3) {

$arr 1 = array ();
$arr = Array_rand ($this->three, $this->length);
for ($i =0; $i <count ($arr); $i + +) {

Array_push ($arr 1, $this->three[$arr [$i]]);
}
echo Implode ("", $arr 1);


}else{

echo ' parameter Error! ‘;
}
}
}

$randstr = new randstring (10,2);

$randstr->getstring ();

?>

Some functions:

Implode () the array is converted to a string, you can add delimiters

Array_rand () randomly extracts the index of an element within an array, and returns an array of an index if the second argument is added.

Array_push () fills the value into an array

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PHP Object-oriented practice