How to check if a string contain any text

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How do I check if a string contains a specific word? 37 answers

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Use the strpos function: http://php.net/manual/en/function.strpos.php

$haystack = "foo bar baz";
$needle   = "bar";

if( strpos( $haystack, $needle ) !== false ) {
    echo ""bar" exists in the haystack variable";
}

In your case:

if( strpos( $a, 'some text' ) !== false ) echo 'text';

Note that my use of the !== operator (instead of != false or == true or even just if( strpos( ... ) ) { ) is because of the "truthy"/"falsy" nature of PHP's handling of the return value of strpos .

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Empty strings are falsey, so you can just write:

if ($a) {
    echo 'text';
}

Although if you're asking if a particular substring exists in that string, you can use strpos() to do that:

if (strpos($a, 'some text') !== false) {
    echo 'text';
}

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http://php.net/manual/en/function.strpos.php我认为你是wondiner如果'一些文本'存在于字符串中吗？

if(strpos( $a , 'some text' ) !== false)

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