在数组php中拆分和存储字符串

Question

I have a string

$descr = "Hello this is a test string";

What I am trying to do is to split the string and store each word which is separated using space into separate array index in PHP. Should I use

$myarray = preg_split("[\s]",$descr);

Expected outcome :

$myarray(1) : hello
$myarray(2) : this
$myarray(3) : is
$myarray(4) : a
$myarray(5) : test
$myarray(6) : string

Each number denotes array index

Answer 1

You need to use explode() like below:-

$myarray = explode(' ', $descr);
print_r($myarray);

Output:-https://eval.in/847916

To re-index and lowercase each word in your array do like this:-

<?php

$descr = "Hello this is a test string";

$myarray = explode(' ', $descr);

$myarray = array_map('strtolower',array_combine(range(1, count($myarray)), array_values($myarray)));
print_r($myarray);

Output:-https://eval.in/847960

To get how many elements are there in the array:-

echo count($myarray);