Examining various ways to convert a string to a number in PHP (cast, intval, *1)

numberconv.php

<?php

$strs=array('1','10','10a10','a12','a','10E3','4.6','4,6','4%6');
foreach ($strs as $str) {
	$int=(int)$str;
	$by1=$str*1;
	$iv=intval($str);
	echo "$str\tint:\t$int\tby1:\t$by1\tintval:\t$iv\n";
}

/*
Output:

1       int:    1       by1:    1       intval: 1
10      int:    10      by1:    10      intval: 10
10a10   int:    10      by1:    10      intval: 10
a12     int:    0       by1:    0       intval: 0
a       int:    0       by1:    0       intval: 0
10E3    int:    10      by1:    10000   intval: 10
4.6     int:    4       by1:    4.6     intval: 4
4,6     int:    4       by1:    4       intval: 4
4%6     int:    4       by1:    4       intval: 4

*/