Calling PHP explode and access first element? [duplicate]

问题

Possible Duplicate:
PHP syntax for dereferencing function result

I have a string, which looks like 1234#5678. Now I am calling this:

$last = explode("#", "1234#5678")[1]

Its not working, there is some syntax error...but where? What I expect is 5678 in $last. Is this not working in PHP?

回答1:

Array dereferencing is not possible in the current PHP versions (unfortunately). But you can use list [docs] to directly assign the array elements to variables:

list($first, $last) = explode("#", "1234#5678");

UPDATE

Since PHP 5.4 (released 01-Mar-2012) it supports array dereferencing.

回答2:

Most likely PHP is getting confused by the syntax. Just assign the result of explode to an array variable and then use index on it:

$arr = explode("#", "1234#5678");
$last = $arr[1];

回答3:

Here's how to get it down to one line:

$last = current(array_slice(explode("#", "1234#5678"), indx,1));

Where indx is the index you want in the array, in your example it was 1.

回答4:

You can't do this:

explode("#", "1234#5678")[1]

Because explode is a function, not an array. It returns an array, sure, but in PHP you can't treat the function as an array until it is set into an array.

This is how to do it:

 $last = explode('#', '1234#5678');
 $last = $last[1];

回答5:

PHP can be a little dim. You probably need to do this on two lines:

$a = explode("#", "1234#5678");
$last = $a[1];

来源：https://stackoverflow.com/questions/8818415/calling-php-explode-and-access-first-element

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php

string

explode