What should I do if the php regular expression cannot be matched?

Solution to the problem that php cannot match the regular pattern: 1. Use the preg_match_all() function to obtain the regular matching content; 2. Output the matching content through print_r.

The operating environment of this article: Windows7 system, PHP7.1 version, DELL G3 computer

Specific questions:

php正则匹配不到
<?php
$url = "http://music.sogou.com/sogou_phb/coo/music/getCampMeta2.jsp?cate=randomsong&count=100&jsoncallback=jsonp1373432530259";
$text = file_get_contents($url);
//正则创建
preg_match("/title\":\"(.*?)\"/", $text, $w);
//echo $text;
echo $w
?>

为什么我这个一个也匹配不到呢？

Solution:

1. To obtain the content matched by the regular expression, you should use the preg_match_all() function

2. It is an array. Arrays cannot be output using echo. If echo outputs an array, it will only display Array

<?php      
 
$url = "
http://music.sogou.com/sogou_phb/coo/music/getCampMeta2.jsp?cate=randomsong&count=100&jsoncallback=jsonp1373432530259
";
 
$text = file_get_contents($url);
 
//正则创建
 
preg_match_all("/title\":\"(.*?)\"/", $text, $w);
 
//echo $text;
 
print_r($w);
 
?>

. Recommended study: "PHP Video Tutorial"

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