CODEWITHSUNDEEP
phppreg-replacepattern-matching
Steve Smith
Steve Smith

Reputation:

Replace a string inside a string given start and end points

Could you please help me to a string inside a string when start and end are given. Actually I want to delete all the contents between //[langStart-en] and //[langEnd-en] in the following example

//[langStart-en]  This is a test //[langEnd-en]

using preg_replace. I used the following code 

  $string = '//[langStart-en] This is a test //[langEnd-en]';
    $pattern = '/\/\/\[langStart-en\][^n]*\/\/\[langEnd-en\]/';
    $replacement = '//[langStart-en]//[langEnd-en]';
    $my_string = preg_replace($pattern, $replacement, $string);

    echo $my_string;

It is showing the following error Warning: preg_replace() [function.preg-replace]: Unknown modifier '/' : eval()'d code on line 4" Please help

Upvotes: 0

Views: 2716

Answers (5)

Steve Nguyen
Steve Nguyen

Reputation: 5974

Yah, I don't mean to be sarcastic.

$my_string = '//[langStart-en]//[langEnd-en]';

Or 

$string = '//[langStart-en] This is a test //[langEnd-en]';
$pattern = '/\/\/\[langStart-en\][^n]*\/\/\[langEnd-en\]/';
$replacement = '//[langStart-en]//[langEnd-en]';
$my_string = preg_replace($pattern, $replacement, $string);

echo $my_string;

Upvotes: 0

Geoffrey Wagner
Geoffrey Wagner

Reputation: 818

$string = '//[langStart-en] This is a test //[langEnd-en]';
$string = preg_replace(
      '/\/\/\[langStart-en\][\s\S]+?\/\/\[langEnd-en\]/',
      '//[langStart-en]//[langEnd-en]',
      $string
 );

Upvotes: 0

davin
davin

Reputation: 45565

Here you go:

//[langStart-en]//[langEnd-en]

For those of you with less sense of humour - shame on you. But here's an answer.

var str = '//[langStart-en] This is a test //[langEnd-en]';
str.replace(/\/\/\[langStart-en\].+\/\/\[langEnd-en\]/g, '//[langStart-en]//[langEnd-en]');

Upvotes: 1

Yogurt The Wise
Yogurt The Wise

Reputation: 4499

Not sure what language your using to do this.

But most languages have an indexof function.

var mystring - "cccctestoooabcccc"; var i = mystring.indexof("test"); var x = mystring.indexof("abc");

With those indexs you can use a function like substring(startindex, endindex);

Although, you will have to add or subtract the length of your string (test or abc) Because the the index is of the first character location. So i = 4 and x = 11 you'd would want to pull the substring between ((i + "test".length), x) Hopefully pull the substring "ooo"

This is rough, but should give you the general idea.

Upvotes: 0

Peter
Peter

Reputation: 27944

Why remove the string between the given strings if you can concatenate the strings you are given. They will give you the same result.

string c = a + b;

Upvotes: 1

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