Php, number of occurrences in a string

Question

I'm looking for a way to count the number of occurrences in a string, I find 2 php function to do this:

I try to understand what is the difference between this 2 functions.

The major difference i saw is that substr_count is case sensitive, But i didn't understand about count_chars the following statement:

Counts the number of occurrences of every byte-value (0..255) in string and returns it in various ways.

If anyone can please explain the major differences between this 2 functions, Maybe some example can help.

Examples for both functions are in the manual, and the description is pretty clear as well IMHO. — C3roe
– C3roe, Commented Mar 8, 2014 at 20:26
I try to understand the manual, Can you please be more descriptive. — Aviel Fedida
– Aviel Fedida, Commented Mar 8, 2014 at 20:27
Not unless you explain better what exactly you are having trouble understanding with. — C3roe
– C3roe, Commented Mar 8, 2014 at 20:30
Before asking you should read the manual. You only ask a specific question when you need info. — Aziz Saleh
– Aziz Saleh, Commented Mar 8, 2014 at 20:31
You did not, if you did you would have seen the Examples listed there. Not sure how more explaining is possible when there are examples. If you had a hard time understanding the manual, there is no possible answer anyone can give you which will make you understand. — Aziz Saleh
– Aziz Saleh, Commented Mar 8, 2014 at 20:32

Amal · Accepted Answer · 2014-03-08 20:30:13Z

3

count_chars() counts the number of occurrences of every byte value, whereas substr_count() will count the number of occurrences of a particular substring.
substr_count() can be used to search for the number of occurrences of a substring inside a selective region of the string, which is not possible with count_chars().
count_chars() returns an array / string depending on the argument, but substr_count() will always return an integer.

answered Mar 8, 2014 at 20:30

Amal

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Pascal Le Merrer · Accepted Answer · 2014-03-08 20:30:06Z

0

substr_countcounts the occurences of a given string in another string; while count_charscounts the occurences of every single character in the given string

answered Mar 8, 2014 at 20:30

Pascal Le Merrer

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