ereg

(PHP 4, PHP 5)

ereg - 正则表达式匹配

警告

这个函数在PHP 5.3.0中是DEPRECATED，而在PHP 7.0.0中是REMOVED。

这个功能的替代方案包括：

preg_match()Descriptionint ereg ( string $pattern , string $string [, array &$regs ] ) Searches a string for matches to the regular expression given in pattern in a case-sensitive way. Parameters pattern Case sensitive regular expression. string The input string. regs If matches are found for parenthesized substrings of pattern and the function is called with the third argument regs, the matches will be stored in the elements of the array regs. $regs1 will contain the substring which starts at the first left parenthesis; $regs2 will contain the substring starting at the second, and so on. $regs0 will contain a copy of the complete string matched. Return Values Returns the length of the matched string if a match for pattern was found in string, or FALSE if no matches were found or an error occurred. If the optional parameter regs was not passed or the length of the matched string is 0, this function returns 1. ChangelogVersionDescription4.1.0Up to (and including) PHP 4.1.0 $regs will be filled with exactly ten elements, even though more or fewer than ten parenthesized substrings may actually have matched. This has no effect on ereg()'s ability to match more substrings. If no matches are found, $regs will not be altered by ereg().ExamplesExample #1 ereg() example The following code snippet takes a date in ISO format (YYYY-MM-DD) and prints it in DD.MM.YYYY format: <?php if (ereg ("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})", $date, $regs)) { echo "$regs[3].$regs[2].$regs[1]"; } else { echo "Invalid date format: $date"; } ?>See Also

eregi() - Case insensitive regular expression match

ereg_replace() - Replace regular expression

eregi_replace() - Replace regular expression case insensitive

preg_match() - Perform a regular expression match

strpos() - Find the position of the first occurrence of a substring in a string

strstr() - Find the first occurrence of a string

quotemeta() - Quote meta characters

← ereg_replace

eregi_replace →