I have a string like 

```
DTSTART;VALUE=DATE:20190208

```

and I want to use the PHP function strpos() to find

```
DTSTART;VALUE=DATE:

```

this works only if I remove the semicolon 

I tried

```
if(strpos($subValue, "DTSTART;VALUE=DATE:")){

```

and also with (1, 2, 3 times) escaping the semicolon 

```
strpos($subValue, "DTSTART\;VALUE=DATE:")
strpos($subValue, "DTSTART\\;VALUE=DATE:")
strpos($subValue, "DTSTART\\\;VALUE=DATE:")

```

I tried stripos() and also single quotes instead of double quotes, no success.

Any idea ?