PHP search string In another string the first occurrence of the function strstr ()

Source: Internet
Author: User

Instance

Find the first occurrence of "world" in "Hello world!" and return the remainder of the string:

<?phpecho strstr ("Hello world!", "World");? >

Definition and usage

The Strstr () function searches for the first occurrence of a string in another string.

Note: This function is binary safe.

Note: The function is case-sensitive. Use the STRISTR () function if you want to make a case-insensitive search.

Grammar

Strstr (String,search,before_search)
parameters description
string required. Specifies the string to be searched.
search required. Specifies the string to search for. If the parameter is a number, the character that matches the ASCII value of the number is searched.
before_search optional. A Boolean value with the default value of "false". If set to "true", it returns the string portion of the first occurrence of the search parameter.

technical details

return value: Returns the remainder of the string (from the matching point). returns FALSE if the searched string is not found.
php version: 4+
update log: in PHP 5.3, the Before_search parameter is added.

More examples

Example 1

Searches for a string with an ASCII value of "O" and returns the remainder of the string:

<?phpecho strstr ("Hello world!", 111);? >

Output:

o world!

Example 2

Returns the string part before the first occurrence of "world":

<?phpecho strstr ("Hello world!", "World", true);? >

Example

<?phpecho strstr ("Hello world!", "World");? >

Output:

world!

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