How to extract substring from a String from specific String to Specific end?

Question

How can I extract specific sub string from a Main String from specific string to specific end String. Like I have below path

your path is D:///path/to/required/directory/sample/subdirectory/a/b/abc/sample.text

from above path I want to extract sub string from /sample to abc. In detail

/sample/subdirectory/a/b/abc

I tried with other substring functions but no success.

Can anybody help me for this?

I had tried with one of example given in php.net site

function reverse_strrchr($haystack, $needle, $trail)
{
        return strrpos($haystack, $needle) ? substr($haystack, 0, strrpos($haystack, $needle) + $trail) : false;
}

but it gives me below path but I want to start from /sample to end

your path is D:///path/to/required/directory/sample/subdirectory/a/b/abc

Is the path likely to be static at all times or will this function be used to grab files from multiple locations? — Chris
– Chris, Commented Sep 26, 2013 at 8:03
@ChrisBertrand No. It will be dynamic every time but /sample will always be available in path. — Smile
– Smile, Commented Sep 26, 2013 at 8:05

Ashwin Parmar · Accepted Answer · 2013-09-26 08:45:37Z

2

I think you would like this. It is proper what you need is.

Your Main String is: D:///path/to/required/directory/sample/subdirectory/a/b/abc/sample.text

You want to Start Extract From "/sample" ( First "sample" word )

You want to Stop Extract To "/sample" ( Last "sample" word )

Will return the following string as Answer "/sample/subdirectory/a/b/abc/sample"

$mainstr = "D:///path/to/required/directory/sample/subdirectory/a/b/abc/sample.text";
$needle = "/sample";
$trail  = "/sample";

echo $this->reverse_strrchr($mainstr, $needle, $trail);

Function definition is:

function reverse_strrchr($haystack, $needle, $trail)
{
    $start  = strpos($haystack, $needle);
    $total  = strrpos($haystack, $trail) - strpos($haystack, $needle) + strlen($trail);
    $result = substr($haystack, $start, $total);
    return $result;
}

answered Sep 26, 2013 at 8:45

Ashwin Parmar

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Comments

q0re · Accepted Answer · 2013-09-26 08:01:07Z

1

You start from position 0.

substr($haystack, 0, strrpos($haystack, $needle) + $trail)

Search the position of /sample and replace it with 0.

For example:

$haystack = -- your path here --;
$result = substr($haystack, strrpos($haystack, "/sample"), strrpos($haystack, "abc"));
echo $result; // Your new "path"

answered Sep 26, 2013 at 8:01

q0re

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3 Comments

Smile Over a year ago

I tried with strpos($str","/sample") but not giving proper position.

Smile Over a year ago

Thanks for quick and perfect reply. I have just modified your version. Like $str = (reverse_strrchr($str, "/", 0));$result = substr($str, strrpos($str, "/sample")); and now it's giving me a path what I needed. I appreciate it ;)

Ashwin Parmar Over a year ago

Check my answer below will be helpful

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