$re = '/\<listRel:entityId\>(\d+)[\s\w]+<\/listRel:entityId\>/';
$str = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<soapenv:Header>
<platformMsgs:documentInfo xmlns:platformMsgs="urn:messages_2016_1.platform.webservices.netsuite.com">
<platformMsgs:nsId>WEBSERVICES_4485702_0725201720695377301235376538_1740c596260</platformMsgs:nsId>
</platformMsgs:documentInfo>
</soapenv:Header>
<soapenv:Body>
<searchResponse xmlns="urn:messages_2016_1.platform.webservices.netsuite.com">
<platformCore:searchResult xmlns:platformCore="urn:core_2016_1.platform.webservices.netsuite.com">
<platformCore:status isSuccess="true"/>
<platformCore:totalRecords>1</platformCore:totalRecords>
<platformCore:pageSize>1000</platformCore:pageSize>
<platformCore:totalPages>1</platformCore:totalPages>
<platformCore:pageIndex>1</platformCore:pageIndex>
<platformCore:searchId>WEBSERVICES_4485702_0725201720695377301235376538_1740c596260</platformCore:searchId>
<platformCore:recordList>
<platformCore:record internalId="13094669" xsi:type="listRel:Customer" xmlns:listRel="urn:relationships_2016_1.lists.webservices.netsuite.com">
<listRel:entityId>917857 James Bond</listRel:entityId>
<listRel:isPerson>true</listRel:isPerson>
<listRel:firstName>James</listRel:firstName>
<listRel:lastName>Bond</listRel:lastName>
<listRel:companyName>Anonymous Customer (Sales Inbox)</listRel:companyName>
<listRel:entityStatus internalId="13">
<platformCore:name>CUSTOMER-Closed Won</platformCore:name>
</listRel:entityStatus>
<listRel:parent internalId="4453">
<platformCore:name>2 Anonymous Customer (Sales Inbox)</platformCore:name>
</listRel:parent>
<listRel:phone>(925) 206-3542</listRel:phone>
<listRel:email>jb@mi6.com</listRel:email>
<listRel:isInactive>false</listRel:isInactive>
<listRel:category internalId="6">
<platformCore:name>Other (.com)</platformCore:name>
</listRel:category>
<listRel:language>_usEnglish</listRel:language>
<listRel:dateCreated>2017-07-17T15:13:48.000-07:00</listRel:dateCreated>
<listRel:emailPreference>_default</listRel:emailPreference>
<listRel:creditHoldOverride>_auto</listRel:creditHoldOverride>
<listRel:unbilledOrders>0.0</listRel:unbilledOrders>
<listRel:consolUnbilledOrders>0.0</listRel:consolUnbilledOrders>
<listRel:consolOverdueBalance>0.0</listRel:consolOverdueBalance>
<listRel:consolDepositBalance>0.0</listRel:consolDepositBalance>
<listRel:consolBalance>0.0</listRel:consolBalance>
<listRel:consolAging>0.0</listRel:consolAging>
<listRel:consolAging1>0.0</listRel:consolAging1>
<listRel:consolAging2>0.0</listRel:consolAging2>
<listRel:consolAging3>0.0</listRel:consolAging3>
<listRel:consolAging4>0.0</listRel:consolAging4>
<listRel:currency internalId="1">
<platformCore:name>US Dollars</platformCore:name>
</listRel:currency>
<listRel:shipComplete>false</listRel:shipComplete>
<listRel:taxable>true</listRel:taxable>
<listRel:taxItem internalId="1178">
<platformCore:name>AVATAX</platformCore:name>
</listRel:taxItem>
<listRel:aging>0.0</listRel:aging>
<listRel:aging1>0.0</listRel:aging1>
<listRel:aging2>0.0</listRel:aging2>
<listRel:aging3>0.0</listRel:aging3>
<listRel:aging4>0.0</listRel:aging4>
<listRel:giveAccess>false</listRel:giveAccess>
<listRel:accessRole internalId="14">
<platformCore:name>Customer Center</platformCore:name>
</listRel:accessRole>
<listRel:receivablesAccount internalId="-10">
<platformCore:name>Use System Preference</platformCore:name>
</listRel:receivablesAccount>
<listRel:lastModifiedDate>2017-07-25T09:07:54.000-07:00</listRel:lastModifiedDate>
<listRel:stage>_customer</listRel:stage>
<listRel:emailTransactions>false</listRel:emailTransactions>
<listRel:printTransactions>false</listRel:printTransactions>
<listRel:faxTransactions>false</listRel:faxTransactions>
<listRel:isBudgetApproved>false</listRel:isBudgetApproved>
<listRel:globalSubscriptionStatus>_softOptIn</listRel:globalSubscriptionStatus>
<listRel:customFieldList>
<platformCore:customField internalId="3153" scriptId="custentity_cseg_v_subsidiary" xsi:type="platformCore:SelectCustomFieldRef">
<platformCore:value internalId="1" typeId="448">
<platformCore:name>North America</platformCore:name>
</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="6" scriptId="custentity_esc_last_modified_date" xsi:type="platformCore:DateCustomFieldRef">
<platformCore:value>2017-07-24T22:00:00.000-07:00</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2416" scriptId="custentity_muv_synctomarketo" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="1498" scriptId="custentity_pri_line_item_modifier_entity" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2269" scriptId="custentity_remove_from_campaign" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="3125" scriptId="custentity_v_auto_created_web_company" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="3027" scriptId="custentity_v_companygroup" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="3157" scriptId="custentity_v_cust_require_po" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="1149" scriptId="custentity_v_demo_customer" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2266" scriptId="custentity_v_do_not_call" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="601" scriptId="custentity_v_do_not_sync_w_parent" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2885" scriptId="custentity_v_fromopportunity" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="3141" scriptId="custentity_v_group_domains" xsi:type="platformCore:StringCustomFieldRef">
<platformCore:value>ERROR: Invalid Expression</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2867" scriptId="custentity_v_hot_activity_marketo" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="3214" scriptId="custentity_v_last_sent_to_marketo" xsi:type="platformCore:DateCustomFieldRef">
<platformCore:value>2017-07-17T15:14:00.000-07:00</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="1671" scriptId="custentity_v_locale" xsi:type="platformCore:SelectCustomFieldRef">
<platformCore:value internalId="13" typeId="299">
<platformCore:name>English - Canada</platformCore:name>
</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="3257" scriptId="custentity_v_marketo_no_sync" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="3215" scriptId="custentity_v_marketo_send_status" xsi:type="platformCore:StringCustomFieldRef">
<platformCore:value>created</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2248" scriptId="custentity_v_netsuite_1_campaigns" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="3144" scriptId="custentity_v_omit_statements" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2264" scriptId="custentity_v_payment_notification" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="600" scriptId="custentity_v_region_class" xsi:type="platformCore:SelectCustomFieldRef">
<platformCore:value internalId="8" typeId="-101">
<platformCore:name>North America : US</platformCore:name>
</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="1668" scriptId="custentity_v_require_invoice_submission" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2874" scriptId="custentity_v_teamgroup" xsi:type="platformCore:SelectCustomFieldRef">
<platformCore:value internalId="9" typeId="410">
<platformCore:name>Sales Group (US)</platformCore:name>
</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2267" scriptId="custentity_v_unsubscribe_mktg_email" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2957" scriptId="custentity_v_usemailmerge" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
<platformCore:customField internalId="2855" scriptId="custentity_v_vat_exempt" xsi:type="platformCore:BooleanCustomFieldRef">
<platformCore:value>false</platformCore:value>
</platformCore:customField>
</listRel:customFieldList>
</platformCore:record>
</platformCore:recordList>
</platformCore:searchResult>
</searchResponse>
</soapenv:Body>
</soapenv:Envelope>';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php