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PHP Manual String Functions addcslashes addslashes bin2hex chop chr chunk_split convert_uudecode convert_uuencode count_chars crc32 crypt echo explode fprintf get_html_translation_table hebrev hex2bin html_entity_decode htmlentities htmlspecialchars htmlspecialchars_decode implode join lcfirst levenshtein localeconv ltrim md5 md5_file metaphone nl_langinfo nl2br number_format ord parse_str print printf quoted_printable_decode quoted_printable_encode quotemeta rtrim setlocale sha1 sha1_file similar_text soundex sprintf sscanf str_contains str_decrement str_ends_with str_getcsv str_increment str_ireplace str_pad str_repeat str_replace str_rot13 str_shuffle str_split str_starts_with str_word_count strcasecmp strchr strcmp strcoll strcspn strip_tags stripcslashes stripos stripslashes stristr strlen strnatcasecmp strnatcmp strncasecmp strncmp strpbrk strpos strrchr strrev strripos strrpos strspn strstr strtok strtolower strtoupper strtr substr substr_compare substr_count substr_replace trim ucfirst ucwords vfprintf vprintf vsprintf wordwrap Deprecated convert_cyr_string hebrevc money_format utf8_decode utf8_encode   strcasecmp strcmp String Functions Last updated: Mon, 26 Oct 2026 strchr (PHP 4, PHP 5, PHP 7, PHP 8) strchr — Alias of strstr() Description This function is an alias of: strstr(). strcasecmp strcmp String Functions Last updated: Mon, 26 Oct 2026

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