String functions

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String functions –strcmp(), strcasecmp()
strcmp(), strcasecmp() both returns zero if the two strings passed to the function are equal. These are identical, with the exception that the former is case-sensitive, while the latter is not.

String functions –strcasencmp()
strcasencmp() allows you to only test a given number of characters inside two strings.

String functions –strlen()
strlen() is used to determine the length of a string.

Output – 28

String functions –strtr()

strtr() used to translate certain characters of a string into other characters.

  • Single character version

    Output – 1bc
  • Multiple-character version

    Output- onetwo3

String functions –strpos()

  •  strpos() allows you to find the position of a substring inside a string. It returns either the numeric position of the substring’s first occurrence within the string, or false if a match could not be found.
  • You can also specify an optional third parameter to strpos() to indicate that you want the search to start from a specific position within the haystack.

    Output – 


String functions –stripos() , strrpos()
 stripos() is case-insensitive version of strpos().

Output- 0

Strpos() does the same as strpos(), but in the revers order.

Output- 3

String functions –strstr()
The strstr() function works similarly to strpos() in that it searches the main string for a substring. The only real difference is that this function returns the portion of the main string that starts with the sub string instead of the latter’s position:

Output- 3456
String functions –stristr()
stristr() is case-insensitive version of strstr().

Output- My World
String functions –str_replace(), str_ireplace()
str_replace() used to replace portions of a string with a different substring.

Output- Hello Reader
Str_ireplace() is the case insensitive version of str_replace().

Output- Hello Reader
Optionally, you can specify a third parameter, that the function fills, upon return, with the number of substitutions made:

Output- 3
If you need to search and replace more than one needle at a time, you can pass the first two arguments to str_replace() in the form of arrays

Output – Hello Reader

Output – Bye Bye
String functions –substr()
The very flexible and powerful substr() function allows you to extract a substring from a larger string.

String functions –number_format()
Number formatting is typically used when you wish to output a number and separate its digits into thousands and decimal points.

imagesOutput- 100 000,698



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