PHP截取字符串中某个符号前面的字符串

<?php
$str = 'upload/20161010/00008.jpg|upload/20161010/00009.jpg|upload/20161010/00020.jpg';
$images = explode('|', $str);
echo $images[0]; // 输出 upload/20161010/00008.jpg

<?php
$str = 'upload/20161010/00008.jpg|upload/20161010/00009.jpg|upload/20161010/00020.jpg';
$image = substr($str, 0, strpos($str, '|'));
echo $image;