proto string strrev string str Reverse string PHP_FUNCTION strrev char

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/* {{{ proto string strrev(string str)
Reverse a string */
PHP_FUNCTION(strrev)
{
char *str;
char *e, *n, *p;
int str_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &str, &str_len) == FAILURE) {
return;
}
n = emalloc(str_len+1);
p = n;
e = str + str_len;
while (--e>=str) {
*p++ = *e;
}
*p = '\0';
RETVAL_STRINGL(n, str_len, 0);
}
/* }}} */
/* {{{ php_similar_str
*/
static void php_similar_str(const char *txt1, int len1, const char *txt2, int len2, int *pos1, int *pos2, int *max)
{
char *p, *q;
char *end1 = (char *) txt1 + len1;
char *end2 = (char *) txt2 + len2;
int l;
*max = 0;
for (p = (char *) txt1; p < end1; p++) {
for (q = (char *) txt2; q < end2; q++) {
for (l = 0; (p + l < end1) && (q + l < end2) && (p[l] == q[l]); l++);
if (l > *max) {
*max = l;
*pos1 = p - txt1;
*pos2 = q - txt2;
}
}
}
}
/* }}} */