How to replace PHP only first and second word and not replace third word?

Question

How to replace PHP only first and second word and not replace third word ?

I have

$test = "hello i love animal love dog and and love tree";

I want to replace fisrt and secode word love to underscore and not replace third word love like this.

hello i _ animal _ dog and and love tree

Then i use this code

$test = str_replace('love', '_', $test);
echo $test;

But result will be

hello i _ animal _ dog and and _ tree

How can i do for replace only first and second word and not replace third word ?

@Rulisp no limit param on str_replace(), there is a count param, but that allows you to pass a variable in as a pointer in order to get the number of instances of the string that were replaced. It doesn't actually allow you to limit the number of instances to be replaced. — Dave
– Dave, Commented May 10, 2017 at 3:47

Thaiseer · Accepted Answer · 2017-05-10 02:34:59Z

0

I think this is the result you are looking for:

$subject = "hello i love animal love dog and and love tree";
$search = "love";
$replace = "_";

$pos = strrpos($subject, $search);

$first_subject = str_replace($search, $replace, substr($subject, 0, $pos));
$subject = $first_subject . substr($subject, $pos, strlen($subject));

echo $subject;

Demo here

edited May 10, 2017 at 2:34

answered May 10, 2017 at 2:30

Thaiseer

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1 Comment

mongkon tiya Over a year ago

Oh best ans ^_^

mickmackusa · Accepted Answer · 2017-05-10 02:44:16Z

0

Here is a regex-free way:

Code (Demo):

$test = "hello i love animal love dog and and love tree";
$test=substr_replace($test,"_",strpos($test,"love"),4);
$test=substr_replace($test,"_",strpos($test,"love"),4);
echo $test;

Output:

hello i _ animal _ dog and and love tree

This method is simple because it does the same method twice -- each time it removes "love at first sight".

edited May 10, 2017 at 2:44

answered May 10, 2017 at 2:20

mickmackusa♦

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2 Comments

mongkon tiya Over a year ago

not work , i want output hello i _ animal _ dog and and love tree how can i do ?

mickmackusa Over a year ago

@mongkontiya Sorry my mistake, I have fixed my method. I think it is actually simpler than my first method.

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