(PHP 8)
str_contains — 确定字符串是否包含指定子串
haystack在其中搜索的字符串。
needle
要在 haystack 中搜索的子串。
示例 #1 使用空字符串 ''
<?php
if (str_contains('abc', '')) {
echo "Checking the existence of the empty string will always return true";
}
?>以上示例会输出：
Checking the existence of the empty string will always return true
示例 #2 展示大小写区分
<?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';
}
?>以上示例会输出：
The string 'lazy' was found in the string "Lazy" was not found because the case does not match
注意: 此函数可安全用于二进制对象。