PHP Find all occurrences of a substring in a string

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I need to parse an HTML document and to find all occurrences of string asdf in it.

I currently have the HTML loaded into a string variable. I would just like the character position so I can loop through the list to return some data after the string.

The strpos function only returns the first occurrence. How about returning all of them?

Answers

Without using regex, something like this should work for returning the string positions:

$html = "dddasdfdddasdffff";
$needle = "asdf";
$lastPos = 0;
$positions = array();

while (($lastPos = strpos($html, $needle, $lastPos))!== false) {
    $positions[] = $lastPos;
    $lastPos = $lastPos + strlen($needle);
}

// Displays 3 and 10
foreach ($positions as $value) {
    echo $value ."<br />";
}

Sunday, October 2, 2022

tanakaraya-42587c430aa5

You need a Ajax call to pass the JS value into php variable

JS Code will be (your js file)

var jsString="hello";
$.ajax({
    url: "ajax.php",
    type: "post",
    data: jsString
});

And in ajax.php (your php file) code will be

$phpString = $_POST['data'];     // assign hello to phpString

Thursday, November 10, 2022

mrvaldez

alert('my name is: <?php echo $man; ?>' );

Friday, August 19, 2022

rod_hyde

try the following

const std::string s = "*A";
const std::string t = "*An";

std::string::size_type n = 0;
while ( ( n = chartDataString.find( s, n ) ) != std::string::npos )
{
    chartDataString.replace( n, s.size(), t );
    n += t.size();
}

Tuesday, December 13, 2022

todd_masco

One way to do this is to find the indices using list comprehension:

currentWord = "hello"

guess = "l"

occurrences = currentWord.count(guess)

indices = [i for i, a in enumerate(currentWord) if a == guess]

print indices

output:

[2, 3]

Friday, September 2, 2022

seb_t

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PHP Find all occurrences of a substring in a string

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