PHP deletes the sub-characters at the end of the string, deletes the beginning characters, and deletes the characters at both ends_PHP tutorial

Today I encountered the following problem when dealing with deleting specific characters at both ends of a string. Let’s look at the example first

$str = 'akmumu/writtendb.json';
What I want to do is delete the akmumu at the beginning, and then delete the .json at the end, so that only useful characters are retained/writedb
First I used ltrim to delete akmumu, and then used rtrim to delete .json
It turns out that I understood trim wrong. The parameters of trim are as follows
rtrim(string,charlist)
Its parameter is a charlist, which means it is not necessarily searched in order. For example, I give a
$str = 'akmumu/writtenbsojn.json';
The result is still /write, and the /writedbsojn I want does not appear. That is to say, as long as any character in the charlist matches, it will continue like this. . .
So I used something else
str_replace, substr_replace is enough
For safety reasons, code has been added to prevent interception errors

Copy code The code is as follows:
if(strpos($str,'akmumu/') !== FALSE
$str = substr($str,7);
if(strpos($str,'.json') !== FALSE)
{
if(substr($str,-5,5) == '.json')
{
$str = substr_replace($str,'',-5);
}
}
}

That’s it

http://www.bkjia.com/PHPjc/372204.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/372204.htmlTechArticleToday I encountered the following problem when dealing with deleting specific characters at both ends of a string. Let’s look at the example SPAN style=FONT first. -SIZE: 18px/SPAN $str = 'akmumu/writedb.json'; What I want to do is delete the start...