Define property and method with same name in class.Delete value at specific index in array.Filter elements in array based on a condition.Combine two arrays to create an Associative Array.Find index of last occurrence of value in array.Count occurrences of specific value in array.Iterate over key-value pairs using foreach.Check if any two adjacent values are same.Check if specific element is present in array.PHP – Convert string array to CSV string.Check if string has a match for regular expression.Check if entire string matches a regular expression.Find all the substrings that match a pattern.Find index of last occurrence in a string.Count number of occurrences of substring in a string.Join elements of string array with separator string.Split string into substrings of specified length.Split string by one or more whitespace characters.Split string by any whitespace character.Trim specific characters from edges of the string.Insert substring at specific index in string.Insert character at specific index in string.Check if string value is a valid number.Check if string contains only uppercase.Check if string contains only lowercase.

Check if string contains only numeric digits.Check if string contains only alphabets.Check if string ends with forward slash (/) character.Check if string ends with a punctuation.Check if string starts with a lowercase.Check if string starts with an uppercase.Check if string starts with specific character.Check if string ends with specific substring.Check if string starts with specific substring.Check if string contains specified substring.Check if strings are equal ignoring case.

Php foreach foreach