For example it could vary like below: 'United States City: Chicago FirstName: Mike LastName: Doe' 'CanadaFirstName: Mike City: Chicago LastName: Doe' I need to find which parameter comes first after United States. Let’s take some examples of using the substr () function. What this means is that they won't ever return false and you'll always get a positive result for e.g. I need to split up the string in to substrings and the list may not always be in the same order. The third is the subject, (aka the source string to search in). The function accepts 5 parameters, listed below: The second is the replacement string. The pregreplace function allows you to perform a regular expression based search and replace inside of strings. these functions return the initial length that matches or doesn't match the given mask/needle (the 'c' in strcspn() stands for "counter"). steveoh: strreplace replaces all occurrence, but i want only the first occurrence if it exists in the start like ltrim function remove the first space only. Replace first occurrence with pregreplace. If you want to find the first occurence of a character other than 'x', then you need strspn(): php > $pos = strspn('xxxwrrw', 'x') Īnd if you need the first occurence of specifically 'w' or 'r', you'd need strcspn(): php > $pos = strcspn('xxxwrrw', 'rw') īut as I said, there's a small caveat. The optimal way to do this (although with a small caveat) would be one of strspn() or strcspn(), but there's a slight difference depending on exactly what you want to do.
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