Php检查字符串中的字符串

代码示例

php检查字符串是否包含word

$myString = 'Hello Bob how are you?';
if (strpos($myString, 'Bob') !== false) {
    echo "My string contains Bob";
}

php chech如果字符串包含

$a = 'How are you?';

if (strpos($a, 'are') !== false) {
    echo 'true';
}

php查找子字符串是否在字符串中

$result = strpos("haystack", "needle");

if ($result != false)
{
  // text found
}

php查找字符串是否包含

if (strpos($string, 'substring') !== false) {
	// do stuff 
}

如何检查字符串是否包含特定的单词？

$a = 'Hello world?';

if (strpos($a, 'Hello') !== false) { //PAY ATTENTION TO !==, not !=
    echo 'true';
}
if (stripos($a, 'HELLO') !== false) { //Case insensitive
    echo 'true';
}

php检查字符串是否包含char

$haystack = 'This is my haystack that we shall check'
$has_A = strpos($haystack, 'A') !== false;
$has_a = strpos($haystack, 'a') !== false;

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