str_contains

(PHP 8)

str_containsDetermine if a string contains a given substring

Descrierea

str_contains ( string $haystack , string $needle ) : bool

Performs a case-sensitive check indicating if needle is contained in haystack.

Parametri

haystack

The string to search in.

needle

The substring to search for in the haystack.

Valorile întoarse

Returns true if needle is in haystack, false otherwise.

Exemple

Example #1 Using the empty string ''

<?php
if (str_contains('abc''')) {
    echo 
"Checking the existence of the empty string will always return true";
}
?>

Exemplul de mai sus va afișa:

Checking the existence of the empty string will always return true

Example #2 Showing case-sensitivity

<?php
$string 
'The lazy fox jumped over the fence';

if (
str_contains($string'lazy')) {
    echo 
"The string 'lazy' was found in the string\n";
}

if (
str_contains($string'Lazy')) {
    echo 
'The string "Lazy" was found in the string';
} else {
    echo 
'"Lazy" was not found because the case does not match';
}

?>

Exemplul de mai sus va afișa:

The string 'lazy' was found in the string
"Lazy" was not found because the case does not match

Note

Notă: Această funcție acceptă și date binare.

A se vedea și

  • str_ends_with() - Checks if a string ends with a given substring
  • str_starts_with() - Checks if a string starts with a given substring
  • stripos() - Find the position of the first occurrence of a case-insensitive substring in a string
  • strrpos() - Find the position of the last occurrence of a substring in a string
  • strripos() - Find the position of the last occurrence of a case-insensitive substring in a string
  • strstr() - Find the first occurrence of a string
  • strpbrk() - Search a string for any of a set of characters
  • substr() - Return part of a string
  • preg_match() - Perform a regular expression match

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