This article mainly introduces the method of realizing PHP string flipping, which has a good reference value. Let’s take a look at it with the editor.
String: $str = "abcdefg";
Method 1 (directly use PHP’s built-in function strrev($str))
print_r(strrev($str));
Use the for loop method, str_split($str)
$newArrOne = [];//初始化一个新的数组 $newStrOne = '';//初始化一个新的字符串 $newArrOne = str_split($str); $arrCount = count($newArrOne); for ($i=0; $i < $arrCount; $i++) { $newStrOne.=$newArrOne[$i]; } echo ""; print_r($newStrOne); echo "
";
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Use the for loop method, strlen($substr)
$newStrTwo = '';//初始化一个新的字符串 $arrCountTwo = strlen($str); for ($i=1; $i <= $arrCountTwo; $i++) { $newStrTwo.=substr($str, -$i, 1); } echo ""; print_r($newStrTwo)."\n"; echo "
";
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Use the for loop method, strlen($substr)
$newStrThree = '';//初始化一个新的字符串 $arrCountThree = strlen($str); for ($i = $arrCountThree; $i>=0;$i--) { @$newStrThree.=$str[$i]; } echo ""; print_r($newStrThree)."\n"; echo "
";
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