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strstr.php
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strstr.php
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<?php
function ft_strlen($str)
{
$tmp = "";
$i = 0;
while ($tmp != $str) {
$tmp .= $str[$i];
$i++;
}
return $i;
}
function ft_strstr($str, $needle , $before_needle = false )
{
$i = 0;
$j = 0;
$flag = false;
$find = false;
$strstr = "";
if(ft_strlen($needle) == 1)
{
$flag = true;
}
while ($i < ft_strlen($str)) {
if($flag)
{
if($str[$i] == $needle)
{
$find = true;
break;
}
}
else
{
$j = 0;
if($str[$i] == $needle[$j])
{
while ($j < ft_strlen($needle)) {
if($str[$i+$j] == $needle[$j])
{
$j++;
}
else
{
break;
}
}
}
if(ft_strlen($needle) == $j)
{
$find = true;
break;
}
}
$i++;
}
if($find)
{
if($before_needle)
{
for ($count=0; $count < $i; $count++) {
$strstr .= $str[$count];
}
return $strstr;
}
for ($count=$i; $count < ft_strlen($str); $count++) {
$strstr .= $str[$count];
}
return $strstr;
}
return false;
}
?>