The example in this article describes the method of finding substrings in a specified string in PHP. Share it with everyone for your reference. The specific analysis is as follows:
The strpos() function can be used to find substrings in php. The strpos() function will try to find the first occurrence of a substring in the source string. If found, it returns a non-negative integer indicating the position of the substring. Otherwise it returns a boolean false.
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$haystack1 = "2349534134345w3mentor16504381640386488129";
$haystack2 = "w3mentor234953413434516504381640386488129";
$haystack3 = "center234953413434516504381640386488129fyi";
$pos1 = strpos($haystack1, "w3mentor");
$pos2 = strpos($haystack2, "w3mentor");
$pos3 = strpos($haystack3, "w3mentor");
print("pos1 = ($pos1); type is " . gettype($pos1) . "n");
print("pos2 = ($pos2); type is " . gettype($pos2) . "n");
print("pos3 = ($pos3); type is " . gettype($pos3) . "n");
?>
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pos1 = (13); type is integer
pos2 = (0); type is integer
pos3 = (); type is boolean
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$haystack1 = "2349534134345w3mentor16504381640386488129";
$haystack2 = "w3mentor234953413434516504381640386488129";
$haystack3 = "center234953413434516504381640386488129fyi";
$pos1 = strpos($haystack1, "w3mentor");
$pos2 = strpos($haystack2, "w3mentor");
$pos3 = strpos($haystack3, "w3mentor");
print("pos1 = ($pos1); type is " . gettype($pos1) . "n");
<🎜>print("pos3 = ($pos3); type is " . gettype($pos3) . "n");<🎜>
<🎜>?>
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Output result:
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pos1 = (13); type is integer
pos2 = (0); type is integer
pos3 = (); type is boolean
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pos3 returns a bool value, that is, the substring is not found
I hope this article will be helpful to everyone’s PHP programming design.
http://www.bkjia.com/PHPjc/969354.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/969354.htmlTechArticleHow to find substrings in a specified string in php. This article mainly introduces how to find substrings in a specified string in php. The method of finding substrings involves the strpos() function in php to find strings...
