How to delete the first character in php string

How to delete the first character in a php string: 1. Use the "$str[0] = "";" method; 2. Use the "substr()" function to delete the first character; 3. Use the "ltrim()" function to delete the first character; 4. Use "preg_replace()" to delete the first character.

php string delete the first character

The first method: replacement method

$str = "hello";
$str[0] = "";
// $str[0] = false;
// $str[0] = null;

Time to execute 1.000.000 tests: 0.39602184295654 seconds

Second method: Use substr() to delete the first character

$str = "hello";
$str = substr($str, 1);

Execute 1.000.000 Time for 1.000.000 tests: 5.153294801712 seconds Seconds

Fourth method: Use preg_replace() to delete the first character

$str = "hello";
$str= ltrim ($str,'h');

Time to execute 1.000.000 tests: 6.8543920516968 seconds

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